diff --git a/extend.go b/extend.go
index c95de14..1f11c17 100644
--- a/extend.go
+++ b/extend.go
@@ -58,7 +58,7 @@ func (l *Conn) Extended(er *ExtendedRequest) (*ExtendResponse, error) {
 	}
 	if len(packet.Children) < 2 || len(packet.Children[1].Children) < 4 {
 		return nil, fmt.Errorf(
-			"ldap: malformed extended response: expected 4 children, got: %d",
+			"ldap: malformed extended response: expected 4 children, got %d",
 			len(packet.Children),
 		)
 	}
diff --git a/v3/extend.go b/v3/extend.go
index c95de14..1f11c17 100644
--- a/v3/extend.go
+++ b/v3/extend.go
@@ -58,7 +58,7 @@ func (l *Conn) Extended(er *ExtendedRequest) (*ExtendResponse, error) {
 	}
 	if len(packet.Children) < 2 || len(packet.Children[1].Children) < 4 {
 		return nil, fmt.Errorf(
-			"ldap: malformed extended response: expected 4 children, got: %d",
+			"ldap: malformed extended response: expected 4 children, got %d",
 			len(packet.Children),
 		)
 	}