diff --git a/Source/Core/Common/ArmCommon.h b/Source/Core/Common/ArmCommon.h
index ae919d9232..439c152d5f 100644
--- a/Source/Core/Common/ArmCommon.h
+++ b/Source/Core/Common/ArmCommon.h
@@ -2,6 +2,8 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
+#include "Common/CommonTypes.h"
+
 enum CCFlags
 {
 	CC_EQ = 0, // Equal