diff --git a/sys/pm_callouts.c b/sys/pm_callouts.c
index e5c80e9..76ecd01 100644
--- a/sys/pm_callouts.c
+++ b/sys/pm_callouts.c
@@ -386,18 +386,20 @@ void redir(portmaster_packet_info* packetInfo, portmaster_packet_info* redirInfo
 
     // Reset routing compartment ID, as we are changing where this is going to.
     // This necessity is unconfirmed.
+    // Experience shows that using the compartment ID can sometimes cause errors.
+    // It seems safer to always use UNSPECIFIED_COMPARTMENT_ID.
     // packetInfo->compartmentId = UNSPECIFIED_COMPARTMENT_ID;
 
     if (packetInfo->direction == 0) {
         // INFO("Send: nbl_status=0x%x, %s", NET_BUFFER_LIST_STATUS(inject_nbl), print_ipv4_packet(packet));
         status = FwpsInjectNetworkSendAsync(handle, NULL, 0,
-                packetInfo->compartmentId, inject_nbl, free_after_inject,
+                UNSPECIFIED_COMPARTMENT_ID, inject_nbl, free_after_inject,
                 packet);
         INFO("InjectNetworkSend executed: %s", print_packet_info(packetInfo));
     } else {
         // INFO("Recv: nbl_status=0x%x, %s", NET_BUFFER_LIST_STATUS(inject_nbl), print_ipv4_packet(packet));
         status = FwpsInjectNetworkReceiveAsync(handle, NULL, 0,
-                packetInfo->compartmentId, packetInfo->interfaceIndex,
+                UNSPECIFIED_COMPARTMENT_ID, packetInfo->interfaceIndex,
                 packetInfo->subInterfaceIndex, inject_nbl, free_after_inject,
                 packet);
         INFO("InjectNetworkReceive executed: %s", print_packet_info(packetInfo));
@@ -572,13 +574,13 @@ void respondWithVerdict(UINT32 id, verdict_t verdict) {
     if (packetInfo->direction == 0) {
         // INFO("Send: nbl_status=0x%x, %s", NET_BUFFER_LIST_STATUS(inject_nbl), print_ipv4_packet(packet));
         status = FwpsInjectNetworkSendAsync(handle, NULL, 0,
-                packetInfo->compartmentId, inject_nbl, free_after_inject,
+                UNSPECIFIED_COMPARTMENT_ID, inject_nbl, free_after_inject,
                 packet);
         INFO("InjectNetworkSend executed: %s", print_packet_info(packetInfo));
     } else {
         // INFO("Recv: nbl_status=0x%x, %s", NET_BUFFER_LIST_STATUS(inject_nbl), print_ipv4_packet(packet));
         status = FwpsInjectNetworkReceiveAsync(handle, NULL, 0,
-                packetInfo->compartmentId, packetInfo->interfaceIndex,
+                UNSPECIFIED_COMPARTMENT_ID, packetInfo->interfaceIndex,
                 packetInfo->subInterfaceIndex, inject_nbl, free_after_inject,
                 packet);
         INFO("InjectNetworkReceive executed: %s", print_packet_info(packetInfo));
@@ -649,13 +651,13 @@ void copy_and_inject(portmaster_packet_info* packetInfo, PNET_BUFFER nb, UINT32
     if (packetInfo->direction == 0) {
         // INFO("Send: nbl_status=0x%x, %s", NET_BUFFER_LIST_STATUS(inject_nbl), print_ipv4_packet(packet));
         status = FwpsInjectNetworkSendAsync(handle, NULL, 0,
-                packetInfo->compartmentId, inject_nbl, free_after_inject,
+                UNSPECIFIED_COMPARTMENT_ID, inject_nbl, free_after_inject,
                 packet);
         INFO("InjectNetworkSend executed: %s", print_packet_info(packetInfo));
     } else {
         // INFO("Recv: nbl_status=0x%x, %s", NET_BUFFER_LIST_STATUS(inject_nbl), print_ipv4_packet(packet));
         status = FwpsInjectNetworkReceiveAsync(handle, NULL, 0,
-                packetInfo->compartmentId, packetInfo->interfaceIndex,
+                UNSPECIFIED_COMPARTMENT_ID, packetInfo->interfaceIndex,
                 packetInfo->subInterfaceIndex, inject_nbl, free_after_inject,
                 packet);
         INFO("InjectNetworkReceive executed: %s", print_packet_info(packetInfo));