diff --git a/video/out/opengl/utils.h b/video/out/opengl/utils.h
index d91907fe9f..7e5f8f5931 100644
--- a/video/out/opengl/utils.h
+++ b/video/out/opengl/utils.h
@@ -149,7 +149,7 @@ void gl_sc_uniform_tex_ui(struct gl_shader_cache *sc, char *name, GLuint texture
 void gl_sc_uniform_image2D(struct gl_shader_cache *sc, char *name, GLuint texture,
                            GLuint iformat, GLenum access);
 void gl_sc_ssbo(struct gl_shader_cache *sc, char *name, GLuint ssbo,
-                char *format, ...);
+                char *format, ...) PRINTF_ATTRIBUTE(4, 5);
 void gl_sc_uniform_f(struct gl_shader_cache *sc, char *name, GLfloat f);
 void gl_sc_uniform_i(struct gl_shader_cache *sc, char *name, GLint f);
 void gl_sc_uniform_vec2(struct gl_shader_cache *sc, char *name, GLfloat f[2]);