diff --git a/ChangeLog b/ChangeLog
index 2b5a0348..27868825 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -8,6 +8,10 @@ version 3.28 (TBD)
   * Modified generic Layer3::Cisco class: use community based indexing if
     the device returns a value for vtpVersion
 
+  [BUG FIXES]
+
+  * Correct port indexing of VSP 4K in L3::Passport
+
 version 3.27 (2015-05-05)
 
   [ENHANCEMENTS]
diff --git a/Info/Layer3/Passport.pm b/Info/Layer3/Passport.pm
index d3d4ac75..cff2ca58 100644
--- a/Info/Layer3/Passport.pm
+++ b/Info/Layer3/Passport.pm
@@ -573,6 +573,9 @@ sub index_factor {
     # Older Accelar models use base 16 instead of 64
     $index_factor = 16
         if ( defined $model and $model =~ /^1[012][05]0/ );
+    # Newer VSP 4K uses 192?
+    $index_factor = 192
+        if ( defined $model and $model =~ /^VSP4/ );
     return $index_factor;
 }