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-rwxr-xr-xsrc/cmd/ndb/dblookup.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/ndb/dblookup.c b/src/cmd/ndb/dblookup.c
index f000d2b7..fd0eb207 100755
--- a/src/cmd/ndb/dblookup.c
+++ b/src/cmd/ndb/dblookup.c
@@ -111,7 +111,7 @@ dblookup(char *name, int class, int type, int auth, int ttl)
/* try lower case version */
for(cp = name; *cp; cp++)
- *cp = tolower(*cp);
+ *cp = tolower((uchar)*cp);
if(cachedb)
rp = rrlookup(dp, type, NOneg);
else