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-rw-r--r--wiretap/iseries.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/wiretap/iseries.c b/wiretap/iseries.c
index dec299bb04..62ee92b8dd 100644
--- a/wiretap/iseries.c
+++ b/wiretap/iseries.c
@@ -718,7 +718,7 @@ iseries_parse_packet (wtap * wth, FILE_T fh, struct wtap_pkthdr *phdr,
/*
* Skip leading white space.
*/
- for (offset = 0; isspace(data[offset]); offset++)
+ for (offset = 0; isspace((guchar)data[offset]); offset++)
;
/*