diff --git a/src/render/opengles/SDL_render_gles.c b/src/render/opengles/SDL_render_gles.c
index 2f3261418..387acf386 100644
--- a/src/render/opengles/SDL_render_gles.c
+++ b/src/render/opengles/SDL_render_gles.c
@@ -22,6 +22,7 @@
 
 #if SDL_VIDEO_RENDER_OGL_ES && !SDL_RENDER_DISABLED
 
+#include "SDL_assert.h"
 #include "SDL_hints.h"
 #include "SDL_opengles.h"
 #include "../SDL_sysrender.h"