diff --git a/src/Shaders/FlatShader2D.frag b/src/Shaders/FlatShader2D.frag
index 44051058d..82c2d5a95 100644
--- a/src/Shaders/FlatShader2D.frag
+++ b/src/Shaders/FlatShader2D.frag
@@ -4,7 +4,7 @@
 
 uniform lowp vec3 color;
 
-#ifndef NEW_GLSL
+#ifdef NEW_GLSL
 out lowp vec4 fragmentColor;
 #endif