diff --git a/src/macosx/native/sun/awt/AWTEvent.m b/src/macosx/native/sun/awt/AWTEvent.m
index fd3caa6051f28bf5aa94ec56d0b3ef91a7951ebe..b2d54f7e7053c40afba41e8b5034ac5ec736a5d9 100644
--- a/src/macosx/native/sun/awt/AWTEvent.m
+++ b/src/macosx/native/sun/awt/AWTEvent.m
@@ -382,7 +382,7 @@ static unichar NsGetDeadKeyChar(unsigned short keyCode)
 {
     TISInputSourceRef currentKeyboard = TISCopyCurrentKeyboardInputSource();
     CFDataRef uchr = (CFDataRef)TISGetInputSourceProperty(currentKeyboard, kTISPropertyUnicodeKeyLayoutData);
-    if (uchr == nil) { return; }
+    if (uchr == nil) { return 0; }
     const UCKeyboardLayout *keyboardLayout = (const UCKeyboardLayout*)CFDataGetBytePtr(uchr);
     // Carbon modifiers should be used instead of NSEvent modifiers
     UInt32 modifierKeyState = (GetCurrentEventKeyModifiers() >> 8) & 0xFF;