diff --git a/modules/system/system.install b/modules/system/system.install
index 415243fafe88751624550bc4caa7112a55b522c0..e2056492eae39aadb2e61f2ac4cc14c58efd65ae 100644
--- a/modules/system/system.install
+++ b/modules/system/system.install
@@ -3704,9 +3704,9 @@ function system_update_6006() {
  */
 function system_update_6007() {
   $ret = array();
-  $ret[] = update_sql("UPDATE {watchdog} SET severity = %d WHERE severity = 0", WATCHDOG_NOTICE);
-  $ret[] = update_sql("UPDATE {watchdog} SET severity = %d WHERE severity = 1", WATCHDOG_WARNING);
-  $ret[] = update_sql("UPDATE {watchdog} SET severity = %d WHERE severity = 2", WATCHDOG_ERROR);
+  $ret[] = update_sql("UPDATE {watchdog} SET severity = ". WATCHDOG_NOTICE ." WHERE severity = 0");
+  $ret[] = update_sql("UPDATE {watchdog} SET severity = ". WATCHDOG_WARNING ." WHERE severity = 1");
+  $ret[] = update_sql("UPDATE {watchdog} SET severity = ". WATCHDOG_ERROR ." WHERE severity = 2");
   return $ret;
 }