diff --git a/shaders/GL/route_arrow.fsh.glsl b/shaders/GL/route_arrow.fsh.glsl
index 1f5d22e4fb..41c33717db 100644
--- a/shaders/GL/route_arrow.fsh.glsl
+++ b/shaders/GL/route_arrow.fsh.glsl
@@ -11,9 +11,12 @@ varying vec2 v_colorTexCoords;
 void main()
 {
   vec4 finalColor = texture2D(u_colorTex, v_colorTexCoords);
-  finalColor.a *= u_opacity;
+  if (finalColor.r == 1.0 && finalColor.g == 1.0 && finalColor.b == 1.0)
+    finalColor=vec4(vec3(u_maskColor.rgb * finalColor.rgb), finalColor.a);
+  else
+    finalColor=vec4(1.0,1.0,1.0,finalColor.a);
   if (finalColor.a < 0.01)
     discard;
-  finalColor = vec4(mix(finalColor.rgb, u_maskColor.rgb, u_maskColor.a), finalColor.a);
+  finalColor = finalColor * u_opacity;
   gl_FragColor = finalColor;
 }