diff --git a/source/tls_channel_handler.c b/source/tls_channel_handler.c
index 5c6426872..f8e9945fa 100644
--- a/source/tls_channel_handler.c
+++ b/source/tls_channel_handler.c
@@ -261,7 +261,7 @@ int aws_tls_ctx_options_init_client_mtls_with_pkcs11(
 
 int aws_tls_ctx_options_set_keychain_path(
     struct aws_tls_ctx_options *options,
-    struct aws_byte_cursor *keychain_path_cursor) {
+    const struct aws_byte_cursor *keychain_path_cursor) {
 
 #if defined(__APPLE__) && !defined(AWS_OS_IOS)
     AWS_LOGF_WARN(AWS_LS_IO_TLS, "static: Keychain path is deprecated.");