diff --git a/knight/shared/KePlatform.h b/knight/shared/KePlatform.h
index a4a9f3cfb..220a1bfc9 100644
--- a/knight/shared/KePlatform.h
+++ b/knight/shared/KePlatform.h
@@ -16,7 +16,7 @@
 
 #define KE_PLATFORM_POSIX
 
-#if defined linux
+#if defined __linux__
 #define KE_PLATFORM_LINUX
 #elif defined __APPLE__
 #define KE_PLATFORM_APPLE