diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index 680b32421..1b9bfd6e8 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -22,6 +22,7 @@
 
 /* The SDL 2D rendering system */
 
+#include "SDL_assert.h"
 #include "SDL_hints.h"
 #include "SDL_log.h"
 #include "SDL_render.h"