diff --git a/indra/newview/llfloaterimsessiontab.cpp b/indra/newview/llfloaterimsessiontab.cpp
index 08a8d8adf8..cc2859c099 100644
--- a/indra/newview/llfloaterimsessiontab.cpp
+++ b/indra/newview/llfloaterimsessiontab.cpp
@@ -896,6 +896,7 @@ void LLFloaterIMSessionTab::restoreFloater()
 		mExpandCollapseLineBtn->setImageOverlay(getString("expandline_icon"));
 		setMessagePaneExpanded(true);
 		saveCollapsedState();
+		mInputEditor->enableSingleLineMode(false);
 		enableResizeCtrls(true, true, true);
 	}
 }