diff --git a/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm b/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm
index b44fbeb35a..186445ceeb 100644
--- a/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm
+++ b/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm
@@ -38,7 +38,12 @@ private:
     static BOOL performKeyEquivalent (id self, SEL selector, NSEvent* event)
     {
         NSResponder* first = [[self window] firstResponder];
+
+       #if (defined (MAC_OS_X_VERSION_10_12) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12)
+        if (([event modifierFlags] & NSEventModifierFlagDeviceIndependentFlagsMask) == NSEventModifierFlagCommand)
+       #else
         if (([event modifierFlags] & NSDeviceIndependentModifierFlagsMask) == NSCommandKeyMask)
+       #endif
         {
             if ([[event charactersIgnoringModifiers] isEqualToString:@"x"]) return [NSApp sendAction:@selector(cut:)       to:first from:self];
             if ([[event charactersIgnoringModifiers] isEqualToString:@"c"]) return [NSApp sendAction:@selector(copy:)      to:first from:self];