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-rw-r--r--src/rfc2131.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rfc2131.c b/src/rfc2131.c
index 17e97b5..5190982 100644
--- a/src/rfc2131.c
+++ b/src/rfc2131.c
@@ -1678,7 +1678,7 @@ static int sanitise(unsigned char *opt, char *buf)
for (i = option_len(opt); i > 0; i--)
{
char c = *p++;
- if (isprint((int)c))
+ if (isprint((unsigned char)c))
*buf++ = c;
}
*buf = 0; /* add terminator */