diff --git a/resources/shaders/ES/gouraud.fs b/resources/shaders/ES/gouraud.fs
index 9cd4f64832..368a502795 100644
--- a/resources/shaders/ES/gouraud.fs
+++ b/resources/shaders/ES/gouraud.fs
@@ -1,5 +1,4 @@
 #version 100
-#extension GL_NV_fragdepth : enable
 
 precision highp float;
 
diff --git a/resources/shaders/ES/mm_contour.fs b/resources/shaders/ES/mm_contour.fs
index c5cea3b642..f27e5d38cd 100644
--- a/resources/shaders/ES/mm_contour.fs
+++ b/resources/shaders/ES/mm_contour.fs
@@ -1,5 +1,4 @@
 #version 100
-#extension GL_NV_fragdepth : enable
 
 precision highp float;
 
diff --git a/resources/shaders/ES/mm_contour.vs b/resources/shaders/ES/mm_contour.vs
index 8d3431bdea..7142a5de69 100644
--- a/resources/shaders/ES/mm_contour.vs
+++ b/resources/shaders/ES/mm_contour.vs
@@ -8,7 +8,7 @@ attribute vec3 v_position;
 
 void main()
 {
-    // Add small epsilon to z to solve z-fighting between painted triangles and contour lines.
+    // Add small epsilon to z to solve z-fighting
 	vec4 clip_position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
 	clip_position.z -= offset * abs(clip_position.w);
     gl_Position = clip_position;