diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f3bff56d2faf7977b1187eae40e5078662c19893..5bd0cad50d71c96738faa54b953091a7b06e7e4c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2004-01-28  Daniel Berlin  <dberlin@dberlin.org>
+	
+	* timevar.c (timevar_print): Mention when checking is enabled.
+
 2004-01-28  Giovanni Bajo  <giovannibajo@gcc.gnu.org>
 
 	* c-lex.c (c_lex): Rename to...
diff --git a/gcc/timevar.c b/gcc/timevar.c
index 9746488c649ba4322cd115f17dcb8555e016ef75..2597177f7634ba446a1981386f4051e396fa11c2 100644
--- a/gcc/timevar.c
+++ b/gcc/timevar.c
@@ -498,6 +498,11 @@ timevar_print (FILE *fp)
   fprintf (fp, "%7.2f\n", total->wall);
 #endif
 
+#ifdef ENABLE_CHECKING
+  fprintf (fp, "Extra diagnostic checks enabled; compiler may run slowly.\n");
+  fprintf (fp, "Configure with --disable-checking to disable checks.\n");
+#endif
+
 #endif /* defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME)
 	  || defined (HAVE_WALL_TIME) */
 }