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-rw-r--r--src/afl-fuzz.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index d5fed9f2..fdc96931 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -231,7 +231,7 @@ static int stricmp(char const *a, char const *b) {
for (;; ++a, ++b) {
int d;
- d = tolower(*a) - tolower(*b);
+ d = tolower((int)*a) - tolower((int)*b);
if (d != 0 || !*a) { return d; }
}