diff --git a/src/Nazara/Renderer/GLSLShader.cpp b/src/Nazara/Renderer/GLSLShader.cpp
index ba8ceeb5c..f56cbada5 100644
--- a/src/Nazara/Renderer/GLSLShader.cpp
+++ b/src/Nazara/Renderer/GLSLShader.cpp
@@ -308,10 +308,10 @@ bool NzGLSLShader::SendBoolean(int location, bool value)
 
 bool NzGLSLShader::SendColor(int location, const NzColor& color)
 {
-	NzVector3f vecColor(color.r/255.f, color.g/255.f, color.b/255.f);
+	NzVector4f vecColor(color.r/255.f, color.g/255.f, color.b/255.f, color.a/255.f);
 
-	if (glProgramUniform3fv)
-		glProgramUniform3fv(m_program, location, 1, vecColor);
+	if (glProgramUniform4fv)
+		glProgramUniform4fv(m_program, location, 1, vecColor);
 	else
 	{
 		if (!Lock())
@@ -320,7 +320,7 @@ bool NzGLSLShader::SendColor(int location, const NzColor& color)
 			return false;
 		}
 
-		glUniform3fv(location, 1, vecColor);
+		glUniform4fv(location, 1, vecColor);
 		Unlock();
 	}
 
diff --git a/src/Nazara/Renderer/ShaderBuilder.cpp b/src/Nazara/Renderer/ShaderBuilder.cpp
index 6fdc37cc6..8e68f38e8 100644
--- a/src/Nazara/Renderer/ShaderBuilder.cpp
+++ b/src/Nazara/Renderer/ShaderBuilder.cpp
@@ -35,7 +35,7 @@ namespace
 
 		/********************Uniformes********************/
 		if ((flags & nzShaderBuilder_DiffuseMapping) == 0 || flags & nzShaderBuilder_Lighting)
-			sourceCode += "uniform vec3 MaterialDiffuse;\n";
+			sourceCode += "uniform vec4 MaterialDiffuse;\n";
 
 		if (flags & nzShaderBuilder_DiffuseMapping)
 			sourceCode += "uniform sampler2D MaterialDiffuseMap;\n";
@@ -65,7 +65,7 @@ namespace
 		if (flags & nzShaderBuilder_DiffuseMapping)
 			sourceCode += " = texture2D(MaterialDiffuseMap, vTexCoord);\n";
 		else
-			sourceCode += " = vec4(MaterialDiffuse, 1.0);\n";
+			sourceCode += " = MaterialDiffuse;\n";
 
 		sourceCode += '}';