diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl
index 8e90c1481feafcbae4710e59423b1bfed5c3d68f..bc51d25309d17a18dd7d955e4e1907fe56f3ce92 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl
@@ -67,6 +67,10 @@ uniform vec4 cloud_color;
 
 uniform float cloud_scale;
 
+// NOTE: Keep these in sync!
+//       indra\newview\app_settings\shaders\class1\deferred\skyV.glsl
+//       indra\newview\app_settings\shaders\class1\deferred\cloudsV.glsl
+//       indra\newview\lllegacyatmospherics.cpp
 void main()
 {
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
index 2cd660ab79c3282db2cc375f0938f6d01f1c0ed9..ead754ec76184e1ef81c3aed376c1329ebbac909 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
@@ -57,6 +57,10 @@ uniform float sun_moon_glow_factor;
 
 uniform vec4 cloud_color;
 
+// NOTE: Keep these in sync!
+//       indra\newview\app_settings\shaders\class1\deferred\skyV.glsl
+//       indra\newview\app_settings\shaders\class1\deferred\cloudsV.glsl
+//       indra\newview\lllegacyatmospherics.cpp
 void main()
 {
 
diff --git a/indra/newview/lllegacyatmospherics.cpp b/indra/newview/lllegacyatmospherics.cpp
index 3c675f7c4ff77228f169fd1f8678ec2d431d96ae..5e3fc8be958106282382c4c224892cf097a9d51b 100644
--- a/indra/newview/lllegacyatmospherics.cpp
+++ b/indra/newview/lllegacyatmospherics.cpp
@@ -265,6 +265,10 @@ LLColor4 LLAtmospherics::calcSkyColorInDir(const LLSettingsSky::ptr_t &psky, Atm
 	return LLColor4(sky_color, 0.0f);
 }
 
+// NOTE: Keep these in sync!
+//       indra\newview\app_settings\shaders\class1\deferred\skyV.glsl
+//       indra\newview\app_settings\shaders\class1\deferred\cloudsV.glsl
+//       indra\newview\lllegacyatmospherics.cpp
 void LLAtmospherics::calcSkyColorWLVert(const LLSettingsSky::ptr_t &psky, LLVector3 & Pn, AtmosphericsVars& vars)
 {
     LLColor3    blue_density = vars.blue_density;