diff --git a/indra/newview/llspatialpartition.cpp b/indra/newview/llspatialpartition.cpp
index c5df09d6e5f212fec982246f398b47b9bcd76981..29d42b3c00c3d11eb1018097f68473b1108651d7 100644
--- a/indra/newview/llspatialpartition.cpp
+++ b/indra/newview/llspatialpartition.cpp
@@ -4076,7 +4076,8 @@ void LLCullResult::assertDrawMapsEmpty()
 	{
 		if (mRenderMapSize[i] != 0)
 		{
-			LL_ERRS() << "Stale LLDrawInfo's in LLCullResult!" << LL_ENDL;
+			LL_ERRS() << "Stale LLDrawInfo's in LLCullResult!"
+				<< " (mRenderMapSize[" << i << "] = " << mRenderMapSize[i] << ")" << LL_ENDL;
 		}
 	}
 }