diff --git a/config/bindings.cfg b/config/bindings.cfg
index 82d237c0..6b4cff15 100644
--- a/config/bindings.cfg
+++ b/config/bindings.cfg
@@ -15,9 +15,10 @@
 # <Modifiers>: One or more of
 #  -   None
 #  *   Any
-#  A   Alt
+#  A   Alt     (=modifier 1)
 #  C   Ctrl
 #  S   Shift
+#  W   Windows (=modifier 4)
 #  1-5 Modifier 1-5
 #
 # <Button>:
diff --git a/src/aclass.c b/src/aclass.c
index 566f89b3..28dbf486 100644
--- a/src/aclass.c
+++ b/src/aclass.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2000-2007 Carsten Haitzler, Geoff Harrison and various contributors
- * Copyright (C) 2004-2019 Kim Woelders
+ * Copyright (C) 2004-2020 Kim Woelders
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to
@@ -546,8 +546,6 @@ ActionDecode(const char *line)
 	     modifiers |= ShiftMask;
 	     break;
 	  case 'A':
-	     modifiers |= Mod1Mask;
-	     break;
 	  case '1':
 	     modifiers |= Mod1Mask;
 	     break;
@@ -557,6 +555,7 @@ ActionDecode(const char *line)
 	  case '3':
 	     modifiers |= Mod3Mask;
 	     break;
+	  case 'W':
 	  case '4':
 	     modifiers |= Mod4Mask;
 	     break;