diff --git a/indra/newview/llfloaterimcontainer.cpp b/indra/newview/llfloaterimcontainer.cpp
index 8d630b9d50d669744c763e93ab4a849f8ce70361..413707baae35c5e17f6e4a24410ee0758e8d213b 100644
--- a/indra/newview/llfloaterimcontainer.cpp
+++ b/indra/newview/llfloaterimcontainer.cpp
@@ -759,7 +759,7 @@ void LLFloaterIMContainer::assignResizeLimits()
     S32 number_of_visible_borders = llmin((is_conv_pane_expanded? 2 : 0) + (is_msg_pane_expanded? 2 : 0), 3);
     S32 summary_width_of_visible_borders = number_of_visible_borders * LLPANEL_BORDER_WIDTH;
 	S32 conv_pane_current_width = is_msg_pane_expanded
-			? mConversationsPane->getRect().getWidth()
+			? (is_conv_pane_expanded? mConversationsPane->getRect().getWidth() : mConversationsPane->getMinDim())
 			: (is_conv_pane_expanded? mConversationsPane->getExpandedMinDim() : mConversationsPane->getMinDim());
 	S32 msg_pane_min_width  = is_msg_pane_expanded ? mMessagesPane->getExpandedMinDim() : 0;
 	S32 new_min_width = conv_pane_current_width + msg_pane_min_width + summary_width_of_visible_borders;