diff --git a/indra/llui/lltabcontainer.cpp b/indra/llui/lltabcontainer.cpp
index 2ec56d6089b420b378f03ffb9ae647178def0600..fe699cfa01fd8c69871aad1932addb9a41db5b3e 100644
--- a/indra/llui/lltabcontainer.cpp
+++ b/indra/llui/lltabcontainer.cpp
@@ -119,6 +119,7 @@ class LLCustomButtonIconCtrl : public LLButton
 	LLCustomButtonIconCtrl(const Params& p):
 		LLButton(p),
 		mIcon(NULL),
+		mIconAlignment(LLFontGL::HCENTER),
 		mIconCtrlPad(p.icon_ctrl_pad)
 		{}