diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
index b4a605b28..9ee88eb39 100644
--- a/client/shaders/nodes_shader/opengl_fragment.glsl
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -185,6 +185,7 @@ float getPenumbraRadius(sampler2D shadowsampler, vec2 smTexCoord, float realDist
 	float baseLength = getBaseLength(smTexCoord);
 	float perspectiveFactor;
 
+	if (PCFBOUND == 0.0) return 0.0;
 	// Return fast if sharp shadows are requested
 	if (SOFTSHADOWRADIUS <= 1.0) {
 		perspectiveFactor = getDeltaPerspectiveFactor(baseLength);