diff --git a/src/openvpn/dco_win.c b/src/openvpn/dco_win.c
index b3268bc..90cff8c 100644
--- a/src/openvpn/dco_win.c
+++ b/src/openvpn/dco_win.c
@@ -460,7 +460,8 @@
     if (!DeviceIoControl(dco->tt->hand, OVPN_IOCTL_MP_NEW_PEER, &newPeer, sizeof(newPeer), NULL, 0,
                          &bytesReturned, NULL))
     {
-        msg(M_ERR, "DeviceIoControl(OVPN_IOCTL_MP_NEW_PEER) failed");
+        msg(M_WARN | M_ERRNO, "DeviceIoControl(OVPN_IOCTL_MP_NEW_PEER) failed");
+        return -1;
     }
 
     return 0;
@@ -575,7 +576,7 @@
 
     if (!DeviceIoControl(dco->tt->hand, ioctl, buf, bufSize, NULL, 0, &bytes_returned, NULL))
     {
-        msg(M_ERR, "DeviceIoControl(OVPN_IOCTL_NEW_KEY) failed");
+        msg(M_WARN | M_ERRNO, "DeviceIoControl(OVPN_IOCTL_NEW_KEY) failed");
         return -1;
     }
     return 0;
@@ -609,7 +610,7 @@
     DWORD bytes_returned = 0;
     if (!DeviceIoControl(dco->tt->hand, ioctl, buf, len, NULL, 0, &bytes_returned, NULL))
     {
-        msg(M_ERR, "DeviceIoControl(OVPN_IOCTL_SWAP_KEYS) failed");
+        msg(M_WARN | M_ERRNO, "DeviceIoControl(OVPN_IOCTL_SWAP_KEYS) failed");
         return -1;
     }
     return 0;