diff --git a/src/cocoa/radiobut.mm b/src/cocoa/radiobut.mm
index a4d9d46d5e..29e001cadf 100644
--- a/src/cocoa/radiobut.mm
+++ b/src/cocoa/radiobut.mm
@@ -71,6 +71,9 @@ bool wxRadioButton::Create(wxWindow *parent, wxWindowID winid,
     [m_cocoaNSView release];
     [GetNSButton() setButtonType: NSRadioButton];
     [GetNSButton() setTitle:wxNSStringWithWxString(label)];
+    // If it's the first in a group, it should be selected
+    if(style&wxRB_GROUP)
+        [GetNSButton() setState: NSOnState];
     [GetNSControl() sizeToFit];
 
     if(m_parent)