diff --git a/src/etc/inc/interfaces.inc b/src/etc/inc/interfaces.inc
index 32d5850ca..5b3b9ee98 100644
--- a/src/etc/inc/interfaces.inc
+++ b/src/etc/inc/interfaces.inc
@@ -4629,12 +4629,15 @@ function interfaces_primary_address6($interface, $realif = null, $ifconfig_detai
         $addrparts = explode('/', $tmpaddr);
 
         foreach (config_read_array('virtualip', 'vip') as $vip) {
-            if (
-                $vip['interface'] == $interface && $vip['mode'] == 'ipalias' &&
-                Net_IPv6::compress($vip['subnet']) == $addrparts[0]
-            ) {
-                /* do not care about alias */
-                continue 2;
+            if ($vip['interface'] == $interface && $vip['mode'] == 'ipalias' && strpos($vip['subnet'], ':') !== false) {
+                /*
+                 * Since we do not know what subnet value was given by user
+                 * uncompress/compress to match correctly compressed system
+                 * value.  Matchig alias cannot be primary address.
+                 */
+                if (Net_IPv6::compress(Net_IPv6::uncompress($vip['subnet'])) == $addrparts[0]) {
+                    continue 2;
+                }
             }
         }