diff --git a/src/cocoa/button.mm b/src/cocoa/button.mm
index 8e6e57780a..aa8472a8d7 100644
--- a/src/cocoa/button.mm
+++ b/src/cocoa/button.mm
@@ -17,7 +17,7 @@
 #endif
 
 #import <AppKit/NSButton.h>
-#import <Foundation/NSString.h>
+#include "wx/cocoa/string.h"
 
 IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
 BEGIN_EVENT_TABLE(wxButton, wxButtonBase)
@@ -41,7 +41,7 @@ bool wxButton::Create(wxWindow *parent, wxWindowID winid,
     [m_cocoaNSView release];
 
     [GetNSButton() setBezelStyle:NSRoundedBezelStyle];
-    [GetNSButton() setTitle:[NSString stringWithCString: label.c_str()]];
+    [GetNSButton() setTitle:wxNSStringWithWxString(label)];
     [GetNSControl() sizeToFit];
 
     if(m_parent)
diff --git a/src/cocoa/radiobut.mm b/src/cocoa/radiobut.mm
index 020b195213..b3916b716b 100644
--- a/src/cocoa/radiobut.mm
+++ b/src/cocoa/radiobut.mm
@@ -14,7 +14,7 @@
 #include "wx/log.h"
 
 #import <AppKit/NSButton.h>
-#import <Foundation/NSString.h>
+#include "wx/cocoa/string.h"
 
 IMPLEMENT_DYNAMIC_CLASS(wxRadioButton, wxControl)
 // wxRadioButtonBase == wxControl
@@ -37,7 +37,7 @@ bool wxRadioButton::Create(wxWindow *parent, wxWindowID winid,
     SetNSButton([[NSButton alloc] initWithFrame: cocoaRect]);
     [m_cocoaNSView release];
     [GetNSButton() setButtonType: NSRadioButton];
-    [GetNSButton() setTitle:[NSString stringWithCString: label.c_str()]];
+    [GetNSButton() setTitle:wxNSStringWithWxString(label)];
     [GetNSControl() sizeToFit];
 
     if(m_parent)