diff --git a/src/acl.c b/src/acl.c
index 1efc1aa47..c77bbd78c 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -57,7 +57,7 @@ static void
 parse_addr_cidr(const char *str, char *host, int *cidr)
 {
     int ret = -1;
-    char *pch;
+    const char *pch;
 
     pch = strchr(str, '/');
     while (pch != NULL) {
diff --git a/src/netutils.c b/src/netutils.c
index 8c7329a93..35b2dc187 100644
--- a/src/netutils.c
+++ b/src/netutils.c
@@ -275,7 +275,7 @@ validate_hostname(const char *hostname, const int hostname_len)
     const char *label = hostname;
     while (label < hostname + hostname_len) {
         size_t label_len = hostname_len - (label - hostname);
-        char *next_dot   = strchr(label, '.');
+        const char *next_dot = strchr(label, '.');
         if (next_dot != NULL)
             label_len = next_dot - label;