diff --git a/pkg/netpol/internal/common/portset.go b/pkg/netpol/internal/common/portset.go
index d13af967..5de66b81 100644
--- a/pkg/netpol/internal/common/portset.go
+++ b/pkg/netpol/internal/common/portset.go
@@ -150,7 +150,7 @@ func (p *PortSet) Union(other *PortSet) {
 
 // ContainedIn: return true if current PortSet object is contained in input PortSet object
 func (p *PortSet) ContainedIn(other *PortSet) bool {
-	return p.Ports.IsSubset(other.Ports)
+	return p.Ports.ContainedIn(other.Ports)
 }
 
 // Intersection: update current PortSet object as intersection with input PortSet object