diff --git a/VERSION b/VERSION
index b9bf45db..3a29efb7 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.478
+8.3.479
diff --git a/extract/ExtUnique.c b/extract/ExtUnique.c
index 81cf6587..05645a3e 100644
--- a/extract/ExtUnique.c
+++ b/extract/ExtUnique.c
@@ -154,9 +154,31 @@ extUniqueCell(def, option)
 	    }
 	    if (lastreg != lp && lastreg != &processedLabel)
 	    {
-		nwarn += extMakeUnique(def, ll, lp, lregList,
+		LabelList *lltest = NULL;
+
+		/* If the last label is a port and this label is not, then
+		 * run extMakeUnique on the port (since extMakeUnique() causes
+		 * all other nodes to be made unique).  This preserves the port
+		 * name whenever a port name disagrees with an internal name.
+		 */
+
+		if (!(ll->ll_label->lab_flags & PORT_DIR_MASK))
+		    for (lltest = lastreg->lreg_labels; lltest; lltest = lltest->ll_next)
+			if (!strcmp(lltest->ll_label->lab_text, text))
+			    if (lltest->ll_label->lab_flags & PORT_DIR_MASK)
+				break;
+
+		if (lltest != NULL)
+		{
+		    nwarn += extMakeUnique(def, lltest, lastreg, lregList,
 				&labelHash, option);
-		HashSetValue(he, (ClientData) &processedLabel);
+		}
+		else
+		{
+		    nwarn += extMakeUnique(def, ll, lp, lregList,
+				&labelHash, option);
+		    HashSetValue(he, (ClientData) &processedLabel);
+		}
 	    }
 	}
     }
@@ -199,7 +221,7 @@ extMakeUnique(def, ll, lreg, lregList, labelHash, option)
     if (option == EXT_UNIQ_ALL)
 	goto makeUnique;
     else if ((option == EXT_UNIQ_NOPORTS || option == EXT_UNIQ_NOTOPPORTS) &&
-		!(ll->ll_label->lab_flags & PORT_DIR_MASK))
+		(ll->ll_label->lab_flags & PORT_DIR_MASK))
 	goto makeUnique;
 
     cpend = strchr(text, '\0');
@@ -207,7 +229,7 @@ extMakeUnique(def, ll, lreg, lregList, labelHash, option)
     if (*cpend == '#') goto makeUnique;
     if (*cpend == '!') return 0;
     if (((option == EXT_UNIQ_NOPORTS) || (option == EXT_UNIQ_NOTOPPORTS))
-		&& (ll->ll_label->lab_flags & PORT_DIR_MASK))
+		&& !(ll->ll_label->lab_flags & PORT_DIR_MASK))
 	return 0;
 
     /* Generate a warning for each occurrence of this label */
@@ -250,7 +272,7 @@ makeUnique:
 	{
 	    if (ll2->ll_label == (Label *) NULL)
 		continue;
-	    if (strcmp(ll2->ll_label->lab_text, name) != 0)
+	    if (strcmp(ll2->ll_label->lab_text, name))
 		continue;
 
 	    /*