diff --git a/aegisub/subtitles_provider_libass.h b/aegisub/subtitles_provider_libass.h
index fc2c6e5f4..0cdb0ccc3 100644
--- a/aegisub/subtitles_provider_libass.h
+++ b/aegisub/subtitles_provider_libass.h
@@ -43,7 +43,12 @@ extern "C" {
 #ifdef __VISUALC__
 #include "stdint.h"
 #endif
+
+#ifdef __WINDOWS__
 #include "../libass/ass.h"
+#else
+#include "ass/ass.h"
+#endif
 }