diff --git a/removetracking.go b/removetracking.go
index 157f07e..f37d4ee 100644
--- a/removetracking.go
+++ b/removetracking.go
@@ -34,5 +34,9 @@ func removeTracking(input string) (output string, err error) {
 	// used for tracking the referer by some feeds.
 	output = strings.Split(output, "?ref=")[0]
 
+	// Remove the URL part starting with "?pk_", which is
+	// used for tracking purposes.
+	output = strings.Split(output, "?pk_")[0]
+
 	return output, err
 }