diff --git a/src/github.com/matrix-org/dendrite/federationapi/writers/threepid.go b/src/github.com/matrix-org/dendrite/federationapi/writers/threepid.go
index ff347fcfe..22c61d911 100644
--- a/src/github.com/matrix-org/dendrite/federationapi/writers/threepid.go
+++ b/src/github.com/matrix-org/dendrite/federationapi/writers/threepid.go
@@ -196,7 +196,7 @@ func createInviteFrom3PIDInvite(
 		},
 	}
 
-	if err := builder.SetContent(content); err != nil {
+	if err = builder.SetContent(content); err != nil {
 		return nil, err
 	}