diff --git a/stepmania/Data/Shaders/GLSL/Color burn.frag b/stepmania/Data/Shaders/GLSL/Color burn.frag
index ea0f742aad..9cf97729a3 100644
--- a/stepmania/Data/Shaders/GLSL/Color burn.frag	
+++ b/stepmania/Data/Shaders/GLSL/Color burn.frag	
@@ -7,7 +7,7 @@ vec4 ApplyBurn( vec4 over, vec4 under, float fill )
 	over.rgb = mix( NeutralColor, over.rgb, fill );
 
 	vec4 ret;
-	ret.rgb = (over.rgb + under.rgb - 1);
+	ret.rgb = (over.rgb + under.rgb - 1.0);
 
 	ret.rgb /= max(over.rgb, 0.000001);
 	ret.rgb *= over.a*under.a;
diff --git a/stepmania/Data/Shaders/GLSL/Color dodge.frag b/stepmania/Data/Shaders/GLSL/Color dodge.frag
index b1c4c92552..99a445e26f 100644
--- a/stepmania/Data/Shaders/GLSL/Color dodge.frag	
+++ b/stepmania/Data/Shaders/GLSL/Color dodge.frag	
@@ -9,8 +9,8 @@ vec4 ApplyDodge( vec4 over, vec4 under, float fill )
 	vec4 ret;
 	ret.rgb = under.rgb;
 
-	ret.rgb /= max(1-over.rgb, 0.000001);
-	ret.rgb = min(ret.rgb, 1);
+	ret.rgb /= max(1.0-over.rgb, 0.000001);
+	ret.rgb = min(ret.rgb, 1.0);
 	ret.rgb *= over.a*under.a;
 //	ret = clamp( ret, 0.0, 1.0 );
 
diff --git a/stepmania/Data/Shaders/GLSL/Hard mix.frag b/stepmania/Data/Shaders/GLSL/Hard mix.frag
index 4002210784..0f8e0568ff 100644
--- a/stepmania/Data/Shaders/GLSL/Hard mix.frag	
+++ b/stepmania/Data/Shaders/GLSL/Hard mix.frag	
@@ -11,8 +11,8 @@ vec4 ApplyVividLight( vec4 over, vec4 under, float fill )
 
 	vec4 ret;
 	ret.rgb = under.rgb;
-	ret.rgb += min(over.rgb, 0);
-	ret.rgb /= max(1-abs(over.rgb), 0.000001);
+	ret.rgb += min(over.rgb, 0.0);
+	ret.rgb /= max(1.0-abs(over.rgb), 0.000001);
 	ret.rgb *= under.a;
 	ret = clamp( ret, 0.0, 1.0 );
 	ret.rgb *= over.a;
diff --git a/stepmania/Data/Shaders/GLSL/Vivid light.frag b/stepmania/Data/Shaders/GLSL/Vivid light.frag
index c26973a646..e7b04f88a8 100644
--- a/stepmania/Data/Shaders/GLSL/Vivid light.frag	
+++ b/stepmania/Data/Shaders/GLSL/Vivid light.frag	
@@ -11,8 +11,8 @@ vec4 ApplyVividLight( vec4 over, vec4 under, float fill )
 
 	vec4 ret;
 	ret.rgb = under.rgb;
-	ret.rgb += min(over.rgb, 0);
-	ret.rgb /= max(1-abs(over.rgb), 0.000001);
+	ret.rgb += min(over.rgb, 0.0);
+	ret.rgb /= max(1.0-abs(over.rgb), 0.000001);
 	ret.rgb *= under.a;
 	ret = clamp( ret, 0.0, 1.0 );
 	ret.rgb *= over.a;