diff --git a/kitty/gl.h b/kitty/gl.h
index ccb7a8949..cc37dea5d 100644
--- a/kitty/gl.h
+++ b/kitty/gl.h
@@ -577,7 +577,7 @@ int add_module_gl_constants(PyObject *module) {
     GLC(GL_VENDOR);
     GLC(GL_SHADING_LANGUAGE_VERSION);
     GLC(GL_RENDERER);
-    GLC(GL_TRIANGLE_FAN); GLC(GL_TRIANGLE_STRIP);
+    GLC(GL_TRIANGLE_FAN); GLC(GL_TRIANGLE_STRIP); GLC(GL_TRIANGLES);
     GLC(GL_COLOR_BUFFER_BIT);
     GLC(GL_VERTEX_SHADER);
     GLC(GL_FRAGMENT_SHADER);