diff --git a/adapters/pubmatic/pubmatic.go b/adapters/pubmatic/pubmatic.go
index b24a78302a9..9c6c1eb3c75 100644
--- a/adapters/pubmatic/pubmatic.go
+++ b/adapters/pubmatic/pubmatic.go
@@ -503,9 +503,12 @@ func parseImpressionObject(imp *openrtb2.Imp, wrapExt *string, pubID *string) er
 		extMap[pmZoneIDKeyName] = pubmaticExt.PmZoneID
 	}
 
-	if bidderExt.Data != nil && bidderExt.Data.AdServer != nil &&
-		bidderExt.Data.AdServer.Name == AdServerGAM && bidderExt.Data.AdServer.AdSlot != "" {
-		extMap[ImpExtAdUnitKey] = bidderExt.Data.AdServer.AdSlot
+	if bidderExt.Data != nil {
+		if bidderExt.Data.AdServer != nil && bidderExt.Data.AdServer.Name == AdServerGAM && bidderExt.Data.AdServer.AdSlot != "" {
+			extMap[ImpExtAdUnitKey] = bidderExt.Data.AdServer.AdSlot
+		} else if bidderExt.Data.PBAdSlot != "" {
+			extMap[ImpExtAdUnitKey] = bidderExt.Data.PBAdSlot
+		}
 	}
 
 	imp.Ext = nil
diff --git a/openrtb_ext/imp.go b/openrtb_ext/imp.go
index 5ec29268a41..1c76c8ef0d4 100644
--- a/openrtb_ext/imp.go
+++ b/openrtb_ext/imp.go
@@ -23,6 +23,7 @@ type ExtStoredRequest struct {
 
 type ExtData struct {
 	AdServer *ExtAdServer `json:"adserver"`
+	PBAdSlot string       `json:"pbadslot"`
 }
 
 type ExtAdServer struct {