diff --git a/plant-eyes/shaders/toon.frag.glsl b/plant-eyes/shaders/toon.frag.glsl
index 3b5caca..cd0c490 100644
--- a/plant-eyes/shaders/toon.frag.glsl
+++ b/plant-eyes/shaders/toon.frag.glsl
@@ -15,10 +15,10 @@ void main()
     float OutlineWidth=0.4;
 	
 	vec4 MidColour=gl_FrontMaterial.diffuse;
-	vec4 HighlightColour=MidColour*2.0f;
-	vec4 ShadowColour=MidColour*0.5f;
-	HighlightColour.a=1.0f;
-	ShadowColour.a=1.0f;
+	vec4 HighlightColour=MidColour*2.0;
+	vec4 ShadowColour=MidColour*0.5;
+	HighlightColour.a=1.0;
+	ShadowColour.a=1.0;
 	
     float lambert = dot(l,n);
     vec4 colour = MidColour;