diff --git a/gtk/css/gtkcssparser.c b/gtk/css/gtkcssparser.c
index b50a753bcb..091eab4a50 100644
--- a/gtk/css/gtkcssparser.c
+++ b/gtk/css/gtkcssparser.c
@@ -612,6 +612,19 @@ gtk_css_parser_skip_until (GtkCssParser    *self,
     }
 }
 
+void
+gtk_css_parser_skip_whitespace (GtkCssParser *self)
+{
+  const GtkCssToken *token;
+
+  for (token = gtk_css_parser_peek_token (self);
+       gtk_css_token_is (token, GTK_CSS_TOKEN_WHITESPACE);
+       token = gtk_css_parser_peek_token (self))
+    {
+      gtk_css_parser_consume_token (self);
+    }
+}
+
 void
 gtk_css_parser_emit_error (GtkCssParser         *self,
                            const GtkCssLocation *start,
diff --git a/gtk/css/gtkcssparserprivate.h b/gtk/css/gtkcssparserprivate.h
index 3d837ca283..d4bc031623 100644
--- a/gtk/css/gtkcssparserprivate.h
+++ b/gtk/css/gtkcssparserprivate.h
@@ -89,6 +89,7 @@ void                    gtk_css_parser_end_block                (GtkCssParser
 void                    gtk_css_parser_skip                     (GtkCssParser                   *self);
 void                    gtk_css_parser_skip_until               (GtkCssParser                   *self,
                                                                  GtkCssTokenType                 token_type);
+void                    gtk_css_parser_skip_whitespace          (GtkCssParser                   *self);
 
 void                    gtk_css_parser_emit_error               (GtkCssParser                   *self,
                                                                  const GtkCssLocation           *start,