diff --git a/src/declarativeimports/core/fadingmaterial_core.frag b/src/declarativeimports/core/fadingmaterial_core.frag
--- a/src/declarativeimports/core/fadingmaterial_core.frag
+++ b/src/declarativeimports/core/fadingmaterial_core.frag
@@ -1,11 +1,12 @@
 #version 150 core
 in highp vec2 v_coord;
+out vec4 fragColor;
 uniform sampler2D u_src;
 uniform sampler2D u_target;
 uniform highp float u_transitionProgress;
 uniform lowp float qt_Opacity;
 void main() {
     lowp vec4 tex1 = texture2D(u_target, v_coord);
     lowp vec4 tex2 = texture2D(u_src, v_coord);
-    gl_FragColor = mix(tex2, tex1, u_transitionProgress) * qt_Opacity;
+    fragColor = mix(tex2, tex1, u_transitionProgress) * qt_Opacity;
 }