diff --git a/sourcepawn/jit/environment.cpp b/sourcepawn/jit/environment.cpp
index 3656f555..e62753df 100644
--- a/sourcepawn/jit/environment.cpp
+++ b/sourcepawn/jit/environment.cpp
@@ -16,6 +16,7 @@
 #include "api.h"
 #include "code-stubs.h"
 #include "watchdog_timer.h"
+#include <stdarg.h>
 
 using namespace sp;
 using namespace SourcePawn;