diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index 62036dec5..056816939 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -1214,6 +1214,7 @@ void LLShaderMgr::initAttribsAndUniforms()
 	mReservedUniforms.push_back("ssao_factor");
 	mReservedUniforms.push_back("ssao_factor_inv");
 	mReservedUniforms.push_back("ssao_effect");
+	mReservedUniforms.push_back("ssao_scale");
 	mReservedUniforms.push_back("kern_scale");
 	mReservedUniforms.push_back("noise_scale");
 	mReservedUniforms.push_back("near_clip");