diff --git a/src/shared/userdb.h b/src/shared/userdb.h
index 4004d80d23..d56d9214a9 100644
--- a/src/shared/userdb.h
+++ b/src/shared/userdb.h
@@ -30,7 +30,7 @@ typedef enum UserDBFlags {
         USERDB_DROPIN_ONLY = USERDB_EXCLUDE_NSS|USERDB_EXCLUDE_VARLINK|USERDB_DONT_SYNTHESIZE_INTRINSIC|USERDB_DONT_SYNTHESIZE_FOREIGN,
 
         USERDB_PARSE_NUMERIC             = 1 << 8,  /* if a numeric UID is specified as name, parse it and look up by UID/GID */
-        USERDB_SYNTHESIZE_NUMERIC        = 1 << 8,  /* synthesize system UID/GID even if it does not exist */
+        USERDB_SYNTHESIZE_NUMERIC        = 1 << 9,  /* synthesize system UID/GID even if it does not exist */
 } UserDBFlags;
 
 /* Well-known errors we'll return here: