diff --git a/indra/newview/lltoastalertpanel.h b/indra/newview/lltoastalertpanel.h
index bd34e40642b6027c7c2508d0f89799e67d9ec658..ef5603fca7ca94871648efaaae4eb099bd375b22 100644
--- a/indra/newview/lltoastalertpanel.h
+++ b/indra/newview/lltoastalertpanel.h
@@ -86,10 +86,10 @@ class LLToastAlertPanel
 		: mWidth(0)
 		{}
 		
-		LLButton* mButton;
+		LLButton* mButton = nullptr;
 		std::string mURL;
-		U32 mURLExternal;
-		S32 mWidth;
+		U32 mURLExternal = 0;
+		S32 mWidth = 0;
 	};
 	std::vector<ButtonData> mButtonData;