diff --git a/widget/src/gtk2/nsGtkKeyUtils.cpp b/widget/src/gtk2/nsGtkKeyUtils.cpp
index 20fe0f69f532..37824cc4dec5 100644
--- a/widget/src/gtk2/nsGtkKeyUtils.cpp
+++ b/widget/src/gtk2/nsGtkKeyUtils.cpp
@@ -273,7 +273,7 @@ PRUint32 nsConvertCharCodeToUnicode(GdkEventKey* aEvent)
             case GDK_KP_Add:
                 return '+';
             case GDK_KP_Separator:
-                return '|';
+                return ',';
             case GDK_KP_Subtract:
                 return '-';
             case GDK_KP_Decimal: