diff --git a/configure b/configure
index 234ad41c58..05af22bf37 100755
--- a/configure
+++ b/configure
@@ -6180,6 +6180,11 @@ if test "$_ass" = yes ; then
 else
     def_ass='#undef CONFIG_ASS'
 fi
+if test "$ass_internal" = yes ; then
+    def_ass_internal='#define CONFIG_ASS_INTERNAL 1'
+else
+    def_ass_internal='#undef CONFIG_ASS_INTERNAL'
+fi
 echores "$_ass"
 
 
@@ -8772,6 +8777,7 @@ $def_tv_v4l2
 
 /* font stuff */
 $def_ass
+$def_ass_internal
 $def_bitmap_font
 $def_enca
 $def_fontconfig
diff --git a/libass/ass_mp.h b/libass/ass_mp.h
index 64b411a550..1c013c0db9 100644
--- a/libass/ass_mp.h
+++ b/libass/ass_mp.h
@@ -24,8 +24,11 @@
 #define LIBASS_MP_H
 
 #include "subreader.h"
-#include "ass_types.h"
+#ifdef CONFIG_LIBASS_INTERNAL
 #include "ass.h"
+#else
+#include <ass/ass.h>
+#endif
 
 extern ass_library_t* ass_library;
 extern int ass_enabled;