diff --git a/src/tuxpaint.c b/src/tuxpaint.c
index f6578f32d..851fad154 100644
--- a/src/tuxpaint.c
+++ b/src/tuxpaint.c
@@ -601,8 +601,13 @@ static void reposition_onscreen_keyboard(int y);
 #endif
 #endif
 
+#if (SDL_MAJOR_VERSION < 2)
+  #define EVENT_FILTER_EVENT_TYPE const SDL_Event
+#else
+  #define EVENT_FILTER_EVENT_TYPE union SDL_Event
+#endif
 
-int TP_EventFilter(void *data, union SDL_Event * event);
+int TP_EventFilter(void *data, EVENT_FILTER_EVENT_TYPE * event);
 
 
 /* *INDENT-OFF* */
@@ -27174,7 +27179,7 @@ static void do_lock_file(void)
   free(lock_fname);
 }
 
-int TP_EventFilter(__attribute__((unused)) void *data, union SDL_Event * event)
+int TP_EventFilter(__attribute__((unused)) void *data, EVENT_FILTER_EVENT_TYPE * event)
 /**
  * FIXME
  */