diff --git a/data/shaders/grass.vert b/data/shaders/grass.vert
index 17a154dfe..6b78b1347 100644
--- a/data/shaders/grass.vert
+++ b/data/shaders/grass.vert
@@ -7,7 +7,7 @@ void main()
 {
 	gl_TexCoord[0] =  gl_MultiTexCoord0;
 	vec4 vertexPosition = ftransform(); //gl_ModelViewMatrix *  gl_Vertex;
-	vertexPosition += vec4(1,1,0,0) * amplitude * gl_Color.r * sin(angle);
+	vertexPosition += vec4(1,0,0,0) * amplitude * gl_Color.r * sin(angle);
 	gl_Position = vertexPosition;
 	gl_FrontColor = vec4(1,1,1,1);
 	gl_BackColor = vec4(1,1,1,1);