diff --git a/indra/llmessage/llavatarnamecache.cpp b/indra/llmessage/llavatarnamecache.cpp
index b16b086a0..01ea42727 100644
--- a/indra/llmessage/llavatarnamecache.cpp
+++ b/indra/llmessage/llavatarnamecache.cpp
@@ -794,6 +794,7 @@ void LLAvatarNameCache::setUseDisplayNames(bool use)
 	if (use != sUseDisplayNames)
 	{
 		sUseDisplayNames = use;
+		LL_DEBUGS("AvNameCache") << "Display names are now: " << (use ? "on" : "off") << LL_ENDL;
 		// flush our cache
 		sCache.clear();