diff --git a/src/os2/listbox.cpp b/src/os2/listbox.cpp
index cd79462934..475e9f8143 100644
--- a/src/os2/listbox.cpp
+++ b/src/os2/listbox.cpp
@@ -748,7 +748,7 @@ bool wxListBox::OS2Command(
     {
         eEvtType = wxEVT_COMMAND_LISTBOX_SELECTED;
     }
-    if (uParam == LN_ENTER)
+    else if (uParam == LN_ENTER)
     {
         eEvtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
     }