diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
index 8a10f34c4..681e7dcf7 100644
--- a/client/shaders/nodes_shader/opengl_fragment.glsl
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -53,6 +53,7 @@ centroid varying float nightRatio;
 varying highp vec3 eyeVec;
 varying float nightFactor;
 
+#ifdef ENABLE_DYNAMIC_SHADOWS
 #if (MATERIAL_WAVING_LIQUID && defined(ENABLE_WATER_REFLECTIONS))
 vec4 perm(vec4 x)
 {