diff --git a/src/Mod/Arch/ArchStairs.py b/src/Mod/Arch/ArchStairs.py
index 1dffe8f72..72905bb37 100644
--- a/src/Mod/Arch/ArchStairs.py
+++ b/src/Mod/Arch/ArchStairs.py
@@ -57,7 +57,7 @@ class _CommandStairs:
         return {'Pixmap'  : 'Arch_Stairs',
                 'MenuText': QtCore.QT_TRANSLATE_NOOP("Arch_Stairs","Stairs"),
                 'Accel': "S, R",
-                'ToolTip': QtCore.QT_TRANSLATE_NOOP("Arch_Space","Creates a stairs objects")}
+                'ToolTip': QtCore.QT_TRANSLATE_NOOP("Arch_Space","Creates a stairs object")}
 
     def Activated(self):
         FreeCAD.ActiveDocument.openTransaction(translate("Arch","Create Stairs"))