diff --git a/gcc/fortran/check.cc b/gcc/fortran/check.cc
index d2c8816da2b..9c66c25e059 100644
--- a/gcc/fortran/check.cc
+++ b/gcc/fortran/check.cc
@@ -67,7 +67,7 @@ gfc_invalid_boz (const char *msg, locus *loc)
       return false;
     }
 
-  const char *hint = _(" [see %<-fno-allow-invalid-boz%>]");
+  const char *hint = _(" [see %<-fallow-invalid-boz%>]");
   size_t len = strlen (msg) + strlen (hint) + 1;
   char *msg2 = (char *) alloca (len);
   strcpy (msg2, msg);