diff --git a/Source/NSButtonCell.m b/Source/NSButtonCell.m
index 2492bd368..414392a38 100644
--- a/Source/NSButtonCell.m
+++ b/Source/NSButtonCell.m
@@ -74,6 +74,7 @@
   delayInterval = 0.4;
   repeatInterval = 0.075;
   altContents = nil;
+  keyEquivalentModifierMask = NSControlKeyMask;
 
   return self;
 }