diff --git a/common/Pcsx2Defs.h b/common/Pcsx2Defs.h
index 40f70f87a6..f8c71202ef 100644
--- a/common/Pcsx2Defs.h
+++ b/common/Pcsx2Defs.h
@@ -31,6 +31,7 @@
 
 #include "Pcsx2Types.h"
 #include <cstddef>
+#include <cassert>
 
 #include "common/emitter/x86_intrin.h"