diff --git a/aegisub/src/frame_main.cpp b/aegisub/src/frame_main.cpp
index 5976b69c3..ca839ef14 100644
--- a/aegisub/src/frame_main.cpp
+++ b/aegisub/src/frame_main.cpp
@@ -82,6 +82,9 @@
 #endif
 #include "charset_conv.h"
 #include "libresrc/libresrc.h"
+#ifdef __WXMAC__
+#include <Carbon/MacWindows.h>
+#endif