diff --git a/gtk/gtkcssparser.c b/gtk/gtkcssparser.c
index fc8ede28b8..a9f0d3712f 100644
--- a/gtk/gtkcssparser.c
+++ b/gtk/gtkcssparser.c
@@ -373,7 +373,7 @@ _gtk_css_parser_read_char (GtkCssParser *parser,
       parser->data++;
       return TRUE;
     }
-  if ((*(guchar *) parser->data) >= 127)
+  if ((*(guchar *) parser->data) >= 128)
     {
       gsize len = g_utf8_skip[(guint) *(guchar *) parser->data];