diff --git a/src/openvpn/dco_freebsd.c b/src/openvpn/dco_freebsd.c
index 931f9f68..65303cd4 100644
--- a/src/openvpn/dco_freebsd.c
+++ b/src/openvpn/dco_freebsd.c
@@ -100,7 +100,7 @@ nvlist_to_sockaddr(const nvlist_t *nvl, struct sockaddr_storage *ss)
 
             in->sin_len = sizeof(*in);
             data = nvlist_get_binary(nvl, "address", &len);
-            assert(len == sizeof(in->sin_addr));
+            ASSERT(len == sizeof(in->sin_addr));
             memcpy(&in->sin_addr, data, sizeof(in->sin_addr));
             in->sin_port = nvlist_get_number(nvl, "port");
             break;
@@ -114,7 +114,7 @@ nvlist_to_sockaddr(const nvlist_t *nvl, struct sockaddr_storage *ss)
 
             in6->sin6_len = sizeof(*in6);
             data = nvlist_get_binary(nvl, "address", &len);
-            assert(len == sizeof(in6->sin6_addr));
+            ASSERT(len == sizeof(in6->sin6_addr));
             memcpy(&in6->sin6_addr, data, sizeof(in6->sin6_addr));
             in6->sin6_port = nvlist_get_number(nvl, "port");
 
diff --git a/src/openvpn/init.c b/src/openvpn/init.c
index 39ea8e4a..2821cd44 100644
--- a/src/openvpn/init.c
+++ b/src/openvpn/init.c
@@ -319,7 +319,7 @@ management_callback_send_cc_message(void *arg, const char *command, const char *
 static unsigned int
 management_callback_remote_entry_count(void *arg)
 {
-    assert(arg);
+    ASSERT(arg);
     struct context *c = (struct context *)arg;
     struct connection_list *l = c->options.connection_list;
 
@@ -329,8 +329,8 @@ management_callback_remote_entry_count(void *arg)
 static bool
 management_callback_remote_entry_get(void *arg, unsigned int index, char **remote)
 {
-    assert(arg);
-    assert(remote);
+    ASSERT(arg);
+    ASSERT(remote);
 
     struct context *c = (struct context *)arg;
     struct connection_list *l = c->options.connection_list;
diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index 0616a176..6858a690 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -3486,9 +3486,9 @@ tuntap_options_postprocess_dns(struct options *o)
     {
         /* Copy --dhcp-options to tuntap_options */
         struct dhcp_options *dhcp = &dns->from_dhcp;
-        assert(sizeof(dhcp->dns) == sizeof(tt->dns));
-        assert(sizeof(dhcp->dns6) == sizeof(tt->dns6));
-        assert(sizeof(dhcp->domain_search_list) == sizeof(tt->domain_search_list));
+        ASSERT(sizeof(dhcp->dns) == sizeof(tt->dns));
+        ASSERT(sizeof(dhcp->dns6) == sizeof(tt->dns6));
+        ASSERT(sizeof(dhcp->domain_search_list) == sizeof(tt->domain_search_list));
 
         tt->domain = dhcp->domain;
         tt->dns_len = dhcp->dns_len;