diff --git a/src/parallels/parallels_driver.c b/src/parallels/parallels_driver.c
index 06a75b353d82f2996976e25407e60246b89c770e..2d6883f78b4c37599622b7eed2f2eb89b58f0e66 100644
--- a/src/parallels/parallels_driver.c
+++ b/src/parallels/parallels_driver.c
@@ -1185,7 +1185,7 @@ parallelsApplyGraphicsParams(virDomainGraphicsDefPtr *oldgraphics, int nold,
     new = newgraphics[0];
 
     if (old->data.vnc.port != new->data.vnc.port &&
-        (old->data.vnc.port != 0 && new->data.vnc.port != -1)) {
+        (old->data.vnc.port != 0 && new->data.vnc.port != 0)) {
 
         goto error;
     } else if (old->data.vnc.autoport != new->data.vnc.autoport ||