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-rw-r--r--src/or/routerparse.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/or/routerparse.c b/src/or/routerparse.c
index c54097782e..c12d07f613 100644
--- a/src/or/routerparse.c
+++ b/src/or/routerparse.c
@@ -214,7 +214,7 @@ get_recommended_software_from_directory(const char *str)
comma = strchr(vl, ',');
version = tor_strndup(vl, comma?(comma-vl):strlen(vl));
cp = version;
- while (isspace(*cp))
+ while (isspace((int)*cp))
++cp;
if (!strncmp(cp, "Tor ", 4))
cp += 4;