diff --git a/sokol_gfx.h b/sokol_gfx.h
index decfd385c..d2d14e631 100644
--- a/sokol_gfx.h
+++ b/sokol_gfx.h
@@ -3994,7 +3994,9 @@ inline int sg_append_buffer(sg_buffer buf_id, const sg_range& data) { return sg_
     #ifndef GL_LUMINANCE
     #define GL_LUMINANCE 0x1909
     #endif
+    #ifndef _SG_GL_CHECK_ERROR
     #define _SG_GL_CHECK_ERROR() { SOKOL_ASSERT(glGetError() == GL_NO_ERROR); }
+    #endif
 #endif
 
 // ███████ ████████ ██████  ██    ██  ██████ ████████ ███████