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-rw-r--r--src/supplemental/util/options.c2
-rw-r--r--src/supplemental/util/options.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/src/supplemental/util/options.c b/src/supplemental/util/options.c
index a8cc969d..c1881185 100644
--- a/src/supplemental/util/options.c
+++ b/src/supplemental/util/options.c
@@ -16,7 +16,7 @@
// Call with optidx set to 1 to start parsing.
int
-nng_opts_parse(int argc, const char **argv, const nng_optspec *opts, int *val,
+nng_opts_parse(int argc, char *const *argv, const nng_optspec *opts, int *val,
const char **optarg, int *optidx)
{
const nng_optspec *opt;
diff --git a/src/supplemental/util/options.h b/src/supplemental/util/options.h
index 00cf1351..392c4a53 100644
--- a/src/supplemental/util/options.h
+++ b/src/supplemental/util/options.h
@@ -38,7 +38,7 @@ typedef struct nng_optspec nng_optspec;
// set to match the option string, and optidx will be increment appropriately.
// Returns -1 when the end of options is reached, 0 on success, or
// NNG_EINVAL if the option parse is invalid for any reason.
-NNG_DECL int nng_opts_parse(int argc, const char **argv,
+NNG_DECL int nng_opts_parse(int argc, char *const *argv,
const nng_optspec *opts, int *val, const char **optarg, int *optidx);
#ifdef __cplusplus