diff --git a/kitty/cell_fragment.glsl b/kitty/cell_fragment.glsl
index 183b1bc0d..70519439e 100644
--- a/kitty/cell_fragment.glsl
+++ b/kitty/cell_fragment.glsl
@@ -198,7 +198,7 @@ void main() {
 #endif
 
 #ifdef BACKGROUND
-#if defined(TRANSPARENT)
+#ifdef TRANSPARENT
     final_color = vec4_premul(background, bg_alpha);
 #else
     final_color = vec4(background, draw_bg);