1 files changed, 1 insertions, 1 deletions

diff --git a/match.c b/match.c
index 736047df1..e08afdeb0 100644
--- a/match.c
+++ b/match.c
@@ -137,7 +137,7 @@ match_pattern_list(const char *string, const char *pattern, u_int len,
                     i < len && subi < sizeof(sub) - 1 && pattern[i] != ',';
                     subi++, i++)
                         sub[subi] = dolower && isupper(pattern[i]) ?
-                            tolower(pattern[i]) : pattern[i];
+                            (char)tolower(pattern[i]) : pattern[i];
                 /* If subpattern too long, return failure (no match). */
                 if (subi >= sizeof(sub) - 1)
                         return 0;