diff -upr ccsm-0.8.4-orig/ccm/Constants.py ccsm-0.8.4/ccm/Constants.py
--- ccsm-0.8.4-orig/ccm/Constants.py	2009-10-14 03:05:30.000000000 +0200
+++ ccsm-0.8.4/ccm/Constants.py	2013-02-18 19:21:23.753873779 +0100
@@ -45,7 +45,7 @@ TableY   = 2
 
 # Action Constants
 #
-KeyModifier = ["Shift", "Control", "Mod1", "Mod2", "Mod3", "Mod4",
+KeyModifier = ["Shift", "Primary", "Mod1", "Mod2", "Mod3", "Mod4",
                "Mod5", "Alt", "Meta", "Super", "Hyper", "ModeSwitch"]
 Edges       = ["Left", "Right", "Top", "Bottom",
                "TopLeft", "TopRight", "BottomLeft", "BottomRight"]
diff -upr ccsm-0.8.4-orig/ccm/Constants.py.in ccsm-0.8.4/ccm/Constants.py.in
--- ccsm-0.8.4-orig/ccm/Constants.py.in	2009-10-14 03:05:30.000000000 +0200
+++ ccsm-0.8.4/ccm/Constants.py.in	2013-02-18 19:22:35.368566815 +0100
@@ -45,7 +45,7 @@ TableY   = 2
 
 # Action Constants
 #
-KeyModifier = ["Shift", "Control", "Mod1", "Mod2", "Mod3", "Mod4",
+KeyModifier = ["Shift", "Primary", "Mod1", "Mod2", "Mod3", "Mod4",
                "Mod5", "Alt", "Meta", "Super", "Hyper", "ModeSwitch"]
 Edges       = ["Left", "Right", "Top", "Bottom",
                "TopLeft", "TopRight", "BottomLeft", "BottomRight"]
diff -upr ccsm-0.8.4-orig/ccm/Widgets.py ccsm-0.8.4/ccm/Widgets.py
--- ccsm-0.8.4-orig/ccm/Widgets.py	2009-10-14 03:05:30.000000000 +0200
+++ ccsm-0.8.4/ccm/Widgets.py	2013-02-18 19:26:51.317044369 +0100
@@ -408,13 +408,13 @@ class ModifierSelector (gtk.DrawingArea)
         x0, y0, width, height = self._x0, self._y0, self._width, self._height
         self._modifiers = {
             "Shift"     : (x0, y0),
-            "Control"   : (x0, y0 + height),
+            "Primary"   : (x0, y0 + height),
             "Super"     : (x0 + width, y0),
             "Alt"       : (x0 + width, y0 + height)
         }
 
         self._names = {
-            "Control"   : "Ctrl"
+            "Primary"   : "Ctrl"
         }
 
     def set_current (self, value):