diff --git a/gtk/css/gtkcssparser.c b/gtk/css/gtkcssparser.c
index e812df259b..2ead2e09af 100644
--- a/gtk/css/gtkcssparser.c
+++ b/gtk/css/gtkcssparser.c
@@ -1000,6 +1000,15 @@ gtk_css_parser_consume_url (GtkCssParser *self)
   return result;
 }
 
+gboolean
+gtk_css_parser_has_number (GtkCssParser *self)
+{
+  return gtk_css_parser_has_token (self, GTK_CSS_TOKEN_SIGNED_NUMBER)
+      || gtk_css_parser_has_token (self, GTK_CSS_TOKEN_SIGNLESS_NUMBER)
+      || gtk_css_parser_has_token (self, GTK_CSS_TOKEN_SIGNED_INTEGER)
+      || gtk_css_parser_has_token (self, GTK_CSS_TOKEN_SIGNLESS_INTEGER);
+}
+
 gboolean
 gtk_css_parser_consume_number (GtkCssParser *self,
                                double       *number)
diff --git a/gtk/css/gtkcssparserprivate.h b/gtk/css/gtkcssparserprivate.h
index 31b44cbce6..520d0eeaa0 100644
--- a/gtk/css/gtkcssparserprivate.h
+++ b/gtk/css/gtkcssparserprivate.h
@@ -118,6 +118,7 @@ gboolean                gtk_css_parser_has_token                (GtkCssParser
                                                                  GtkCssTokenType                 token_type);
 gboolean                gtk_css_parser_has_ident                (GtkCssParser                   *self,
                                                                  const char                     *ident);
+gboolean                gtk_css_parser_has_number               (GtkCssParser                   *self);
 gboolean                gtk_css_parser_has_integer              (GtkCssParser                   *self);
 gboolean                gtk_css_parser_has_function             (GtkCssParser                   *self,
                                                                  const char                     *name);