diff --git a/indra/llcommon/lluri.h b/indra/llcommon/lluri.h
index eb5c5203eb6f7c7b55a9e4cf5e669b4f85db9f0d..8e69e8558ac178d3eaecb035eff26db3947a6f47 100644
--- a/indra/llcommon/lluri.h
+++ b/indra/llcommon/lluri.h
@@ -178,6 +178,6 @@ class LL_COMMON_API LLURI
 };
 
 // this operator required for tut
-bool operator!=(const LLURI& first, const LLURI& second);
+LL_COMMON_API bool operator!=(const LLURI& first, const LLURI& second);
 
 #endif // LL_LLURI_H