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-rw-r--r--lib/isc/commandline.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/isc/commandline.c b/lib/isc/commandline.c
index 416fba1927a62..e58b1b8ceddc9 100644
--- a/lib/isc/commandline.c
+++ b/lib/isc/commandline.c
@@ -95,7 +95,7 @@ static char endopt = '\0';
int
isc_commandline_parse(int argc, char * const *argv, const char *options) {
static char *place = ENDOPT;
- char *option; /* Index into *options of option. */
+ const char *option; /* Index into *options of option. */
REQUIRE(argc >= 0 && argv != NULL && options != NULL);