diff --git a/public/icvar.h b/public/icvar.h
index da39973a..2682c5a6 100644
--- a/public/icvar.h
+++ b/public/icvar.h
@@ -12,6 +12,7 @@
 
 #include "appframework/IAppSystem.h"
 #include "tier1/iconvar.h"
+#include "tier0/memalloc.h"
 
 class ConCommandBase;
 class ConCommand;