diff --git a/plant-eyes/shaders/rocks.frag.glsl b/plant-eyes/shaders/rocks.frag.glsl
index 5168286..c8224c7 100644
--- a/plant-eyes/shaders/rocks.frag.glsl
+++ b/plant-eyes/shaders/rocks.frag.glsl
@@ -20,9 +20,9 @@ void main()
 	//vec4 MidColour=gl_FrontMaterial.diffuse;
 	//if(P.y<0) MidColour=vec4(1,1,1,1);
 		
-	vec4 MidColour=mix(vec4((1.0-gl_FrontMaterial.diffuse.r)*0.2f,
-							(1.0-gl_FrontMaterial.diffuse.g)*0.2f,
-							(1.0-gl_FrontMaterial.diffuse.b)*0.2f,1),
+	vec4 MidColour=mix(vec4((1.0-gl_FrontMaterial.diffuse.r)*0.2,
+							(1.0-gl_FrontMaterial.diffuse.g)*0.2,
+							(1.0-gl_FrontMaterial.diffuse.b)*0.2,1),
 					 gl_FrontMaterial.diffuse,
 					 smoothstep(-5.0,5.0,P.y));