diff --git a/src/Shaders/MeshVisualizer.frag b/src/Shaders/MeshVisualizer.frag
index b679f1cfb..a3adfcc03 100644
--- a/src/Shaders/MeshVisualizer.frag
+++ b/src/Shaders/MeshVisualizer.frag
@@ -63,7 +63,9 @@ in lowp vec3 barycentric;
 out lowp vec4 fragmentColor;
 #endif
 
-#if defined(WIREFRAME_RENDERING) && defined(GL_ES) && __VERSION__ < 300
+/* This is needed also on desktop ES 3.0 emulation on NVidia 330.20 even though
+   fwidth() is part of GLSL ES 3.0 */
+#if defined(WIREFRAME_RENDERING) && defined(GL_ES)
 #extension GL_OES_standard_derivatives : enable
 #endif