diff --git a/Shaders/landmass.frag b/Shaders/landmass.frag
index 91448690b..e92c1d1f4 100644
--- a/Shaders/landmass.frag
+++ b/Shaders/landmass.frag
@@ -55,12 +55,15 @@ float ray_intersect(sampler2D reliefMap, vec2 dp, vec2 ds)
 
 void main (void)
 {
+	float bump = 1.0;
+
 	if ( quality_level >= 3.5 ) {
 		linear_search_steps = 20;
 	}
-	vec2 uv, dp, ds;
+
+	vec2 uv, dp = vec2(0, 0), ds = vec2(0, 0);
 	vec3 N;
-	float d;
+	float d = 0;
 	if ( bump > 0.9 && quality_level >= 2.0 )
 	{
 		vec3 V = normalize(ecPosition.xyz);
diff --git a/Shaders/landmass.vert b/Shaders/landmass.vert
index de27c5ac3..0c717001e 100644
--- a/Shaders/landmass.vert
+++ b/Shaders/landmass.vert
@@ -5,7 +5,6 @@ varying vec3  VTangent;
 varying vec3  VBinormal;
 varying vec3  Normal;
 varying vec4  constantColor;
-varying float bump;
 
 attribute vec3 tangent;
 attribute vec3 binormal;
@@ -18,7 +17,6 @@ void main(void)
 	VNormal = gl_NormalMatrix * gl_Normal;
 	VTangent = gl_NormalMatrix * tangent;
 	VBinormal = gl_NormalMatrix * binormal;
-	bump = 1.0;
 
 	gl_FrontColor = gl_Color;
 	constantColor = gl_FrontMaterial.emission