diff --git a/examples/shaders/resources/shaders/glsl100/depth_write.fs b/examples/shaders/resources/shaders/glsl100/depth_write.fs
index 6200bd23a..15095db11 100644
--- a/examples/shaders/resources/shaders/glsl100/depth_write.fs
+++ b/examples/shaders/resources/shaders/glsl100/depth_write.fs
@@ -1,11 +1,13 @@
 #version 100
-
 #extension GL_EXT_frag_depth : enable          
+
 precision mediump float;
 
+// Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;
 varying vec4 fragColor;
 
+// Input uniform values
 uniform sampler2D texture0;
 uniform vec4 colDiffuse;
 
@@ -15,4 +17,4 @@ void main()
     
     gl_FragColor = texelColor*colDiffuse*fragColor;
     gl_FragDepthEXT = 1.0 - gl_FragCoord.z;
-}
\ No newline at end of file
+}