diff --git a/UI/AppKit/Application/ApplicationDelegate.mm b/UI/AppKit/Application/ApplicationDelegate.mm
index e9d375f1fa4..78b05216869 100644
--- a/UI/AppKit/Application/ApplicationDelegate.mm
+++ b/UI/AppKit/Application/ApplicationDelegate.mm
@@ -657,6 +657,9 @@
     [submenu addItem:[[NSMenuItem alloc] initWithTitle:@"Dump All Resolved Styles"
                                                 action:@selector(dumpAllResolvedStyles:)
                                          keyEquivalent:@""]];
+    [submenu addItem:[[NSMenuItem alloc] initWithTitle:@"Dump CSS Errors"
+                                                action:@selector(dumpCSSErrors:)
+                                         keyEquivalent:@""]];
     [submenu addItem:[[NSMenuItem alloc] initWithTitle:@"Dump History"
                                                 action:@selector(dumpHistory:)
                                          keyEquivalent:@""]];
diff --git a/UI/AppKit/Interface/TabController.mm b/UI/AppKit/Interface/TabController.mm
index b89750b04f0..ba51fc1821f 100644
--- a/UI/AppKit/Interface/TabController.mm
+++ b/UI/AppKit/Interface/TabController.mm
@@ -370,6 +370,11 @@ static NSString* const TOOLBAR_TAB_OVERVIEW_IDENTIFIER = @"ToolbarTabOverviewIde
     [self debugRequest:"dump-all-resolved-styles" argument:""];
 }
 
+- (void)dumpCSSErrors:(id)sender
+{
+    [self debugRequest:"dump-all-css-errors" argument:""];
+}
+
 - (void)dumpHistory:(id)sender
 {
     [self debugRequest:"dump-session-history" argument:""];