diff --git a/public/tier1/utlmap.h b/public/tier1/utlmap.h
index 7156464d..730f8e12 100644
--- a/public/tier1/utlmap.h
+++ b/public/tier1/utlmap.h
@@ -15,6 +15,7 @@
 
 #include "tier0/dbg.h"
 #include "utlrbtree.h"
+#include "utlleanvector.h"
 
 //-----------------------------------------------------------------------------
 //
diff --git a/public/tier1/utlrbtree.h b/public/tier1/utlrbtree.h
index 0d20a0a8..b1e20086 100644
--- a/public/tier1/utlrbtree.h
+++ b/public/tier1/utlrbtree.h
@@ -10,6 +10,7 @@
 #define UTLRBTREE_H
 
 #include "tier1/utlmemory.h"
+#include "tier1/utlleanvector.h"
 #include "tier1/utlfixedmemory.h"
 #include "tier1/utlblockmemory.h"