diff --git a/core/Makefile b/core/Makefile
index 8b865555e..9685360a6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -82,7 +82,7 @@ ifeq "$(ENGINE)" "left4dead"
 	override ENGSET = true
 endif
 
-CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 
 LINK += $(HL2LIB)/tier1_i486.a $(HL2LIB)/mathlib_i486.a vstdlib_i486.so \
 	tier0_i486.so -lpthread -static-libgcc
diff --git a/extensions/bintools/Makefile b/extensions/bintools/Makefile
index 00c69967b..063030124 100644
--- a/extensions/bintools/Makefile
+++ b/extensions/bintools/Makefile
@@ -71,7 +71,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn \
 		-I$(SMSDK)/public/extensions -I$(SMSDK)/public/jit -I$(SMSDK)/public/jit/x86
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/extensions -I$(SMSDK)/public/jit \
 		-I$(SMSDK)/public/jit/x86 -I$(SMSDK)/public/sourcepawn
diff --git a/extensions/clientprefs/Makefile b/extensions/clientprefs/Makefile
index 5a3283092..2adb9f214 100644
--- a/extensions/clientprefs/Makefile
+++ b/extensions/clientprefs/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(SMSDK)/public/extensions \
 		-I$(MMSOURCE17)/core/sourcehook
diff --git a/extensions/cstrike/Makefile b/extensions/cstrike/Makefile
index ca885f1d0..11c7f65a7 100644
--- a/extensions/cstrike/Makefile
+++ b/extensions/cstrike/Makefile
@@ -69,7 +69,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/extensions \
 		-I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/curl/Makefile b/extensions/curl/Makefile
index fea9f3a1e..6e95629fe 100644
--- a/extensions/curl/Makefile
+++ b/extensions/curl/Makefile
@@ -71,7 +71,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/geoip/Makefile b/extensions/geoip/Makefile
index fcb25a560..7626de923 100644
--- a/extensions/geoip/Makefile
+++ b/extensions/geoip/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/mysql/Makefile b/extensions/mysql/Makefile
index a1ee185a1..26464ddcc 100644
--- a/extensions/mysql/Makefile
+++ b/extensions/mysql/Makefile
@@ -75,7 +75,7 @@ ifeq "$(USEMETA)" "true"
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(MMSOURCE17)/core/sourcehook \
 		-I$(MYSQL)/include
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 endif
 
 LINK += $(MYSQL)/lib/libmysqlclient_r.a -lz -lpthread
diff --git a/extensions/regex/Makefile b/extensions/regex/Makefile
index 7f7aaa963..262f17fdc 100644
--- a/extensions/regex/Makefile
+++ b/extensions/regex/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(MMSOURCE17)/core/sourcehook
 endif
diff --git a/extensions/sdktools/Makefile b/extensions/sdktools/Makefile
index 1040f1980..484701451 100644
--- a/extensions/sdktools/Makefile
+++ b/extensions/sdktools/Makefile
@@ -72,7 +72,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/mathlib -I$(HL2PUB)/tier0 \
 		-I$(HL2PUB)/tier1 -I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/extensions \
 		-I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/sqlite/Makefile b/extensions/sqlite/Makefile
index c45c46330..2320e901e 100644
--- a/extensions/sqlite/Makefile
+++ b/extensions/sqlite/Makefile
@@ -88,7 +88,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(MMSOURCE17)/core/sourcehook
 endif
diff --git a/extensions/structs/Makefile b/extensions/structs/Makefile
index e6f0c0395..de4e5260e 100644
--- a/extensions/structs/Makefile
+++ b/extensions/structs/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/mathlib -I$(HL2PUB)/tier0 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(METAMOD)/sourcemm -I$(SMSDK)/public
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/tf2/Makefile b/extensions/tf2/Makefile
index 30260c568..936149b9f 100644
--- a/extensions/tf2/Makefile
+++ b/extensions/tf2/Makefile
@@ -70,7 +70,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/extensions \
 		-I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/topmenus/Makefile b/extensions/topmenus/Makefile
index bbad58277..48f19e6fe 100644
--- a/extensions/topmenus/Makefile
+++ b/extensions/topmenus/Makefile
@@ -69,7 +69,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(SMSDK)/public/extensions \
 		-I$(MMSOURCE17)/core/sourcehook
diff --git a/extensions/updater/Makefile b/extensions/updater/Makefile
index 008608b75..3c17e1126 100644
--- a/extensions/updater/Makefile
+++ b/extensions/updater/Makefile
@@ -73,7 +73,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn \
 		-I$(SMSDK)/public/extensions
diff --git a/public/mms_sample_ext/Makefile b/public/mms_sample_ext/Makefile
index b5b103047..fe40dc08c 100644
--- a/public/mms_sample_ext/Makefile
+++ b/public/mms_sample_ext/Makefile
@@ -58,7 +58,7 @@ ifeq "$(ENGINE)" "left4dead"
 	override ENGSET = true
 endif
 
-CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 
 LINK = vstdlib_i486.so tier0_i486.so -m32 -ldl -lm
 
diff --git a/public/sample_ext/Makefile b/public/sample_ext/Makefile
index 7eff0a270..791a51f7c 100644
--- a/public/sample_ext/Makefile
+++ b/public/sample_ext/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -DSE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif