diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl
index 99a6fe85fe8178e1f07ba0b550b12e322966b722..9c82056fd7f71dda504eeb247ace58338bc2c7ff 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl
@@ -31,7 +31,7 @@ out vec4 frag_color;
 
 uniform float minimum_alpha;
 
-vec4 diffuseLookup(vec2 texcoord);
+/* vec4 diffuseLookup(vec2 texcoord); */
 
 vec3 fullbrightAtmosTransport(vec3 light);
 vec4 applyWaterFog(vec4 color);
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl
index df182168f3c59baa50aa671339355b2267146a3a..d3dacf9bc4d81e65f7cd91eda199da74440a4d66 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl
@@ -32,7 +32,7 @@ out vec4 frag_color;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec4 diffuseLookup(vec2 texcoord);
+/* vec4 diffuseLookup(vec2 texcoord); */
 
 vec3 fullbrightAtmosTransport(vec3 light);
 vec4 applyWaterFog(vec4 color);