diff --git a/mongoose.c b/mongoose.c
index 3886950f..98ddb7f5 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -4630,7 +4630,7 @@ int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip) {
     uint32_t net, mask;
     if (k.ptr[0] != '+' && k.ptr[0] != '-') return -1;
     if (parse_net(&k.ptr[1], &net, &mask) == 0) return -2;
-    if ((remote_ip & mask) == net) allowed = k.ptr[0];
+    if ((mg_ntohl(remote_ip) & mask) == net) allowed = k.ptr[0];
   }
   return allowed == '+';
 }
diff --git a/src/util.c b/src/util.c
index 5f47815c..9d6ff65e 100644
--- a/src/util.c
+++ b/src/util.c
@@ -238,7 +238,7 @@ int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip) {
     uint32_t net, mask;
     if (k.ptr[0] != '+' && k.ptr[0] != '-') return -1;
     if (parse_net(&k.ptr[1], &net, &mask) == 0) return -2;
-    if ((remote_ip & mask) == net) allowed = k.ptr[0];
+    if ((mg_ntohl(remote_ip) & mask) == net) allowed = k.ptr[0];
   }
   return allowed == '+';
 }
diff --git a/test/unit_test.c b/test/unit_test.c
index 482a81ce..53d06eb3 100644
--- a/test/unit_test.c
+++ b/test/unit_test.c
@@ -1539,7 +1539,7 @@ static void test_udp(void) {
 }
 
 static void test_check_ip_acl(void) {
-  uint32_t ip = 0x01020304;
+  uint32_t ip = mg_htonl(0x01020304);
   ASSERT(mg_check_ip_acl(mg_str(NULL), ip) == 1);
   ASSERT(mg_check_ip_acl(mg_str(""), ip) == 1);
   ASSERT(mg_check_ip_acl(mg_str("invalid"), ip) == -1);