1 files changed, 5 insertions, 1 deletions
diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index b854218e3d..40aff36dac 100755
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -87,7 +87,6 @@ LLShaderFeatures::LLShaderFeatures()
 	, mIndexedTextureChannels(0)
 	, disableTextureIndex(false)
 	, hasAlphaMask(false)
-	, hasSRGB(false)
 {
 }
 
@@ -375,6 +374,11 @@ BOOL LLGLSLShader::createShader(vector<string> * attributes,
 
 	// Create program
 	mProgramObject = glCreateProgramObjectARB();
+
+#if LL_DARWIN
+    // work-around missing mix(vec3,vec3,bvec3)
+    mDefines["OLD_SELECT"] = "1";
+#endif
 	
 	//compile new source
 	vector< pair<string,GLenum> >::iterator fileIter = mShaderFiles.begin();