diff --git a/src/names.c b/src/names.c
index dcad3d76..e9b689ce 100644
--- a/src/names.c
+++ b/src/names.c
@@ -1053,7 +1053,7 @@ safer_name_suffix (char const *file_name, bool link_target)
 		N_("Removing leading `%s' from member names"),
 		N_("Removing leading `%s' from hard link targets")
 	      };
-	      WARN ((0, 0, _(diagnostic[link_target]), prefix));
+	      WARN ((0, 0, "%s", _(diagnostic[link_target]), prefix));
 	    }
 	}
     }
@@ -1067,7 +1067,7 @@ safer_name_suffix (char const *file_name, bool link_target)
 	    N_("Substituting `.' for empty member name"),
 	    N_("Substituting `.' for empty hard link target")
 	  };
-	  WARN ((0, 0, _(diagnostic[link_target])));
+	  WARN ((0, 0, "%s", _(diagnostic[link_target])));
 	}
 
       p = ".";