diff --git a/public/tier1/rawallocator.h b/public/tier1/rawallocator.h
index 3aa0e4c3..639f675a 100644
--- a/public/tier1/rawallocator.h
+++ b/public/tier1/rawallocator.h
@@ -21,6 +21,8 @@
 #include "platform.h"
 #include "basetypes.h"
 
+#include <limits>
+
 #include "memdbgon.h"
 
 class CMemAllocAllocator