diff --git a/includes/engines/LuaCommon/LuaInterpreter.php b/includes/engines/LuaCommon/LuaInterpreter.php
index 846c658f..14f3fd50 100644
--- a/includes/engines/LuaCommon/LuaInterpreter.php
+++ b/includes/engines/LuaCommon/LuaInterpreter.php
@@ -16,8 +16,9 @@ abstract class Scribunto_LuaInterpreter {
 	 * at zero. If an error occurs, a Scribunto_LuaError will be thrown.
 	 *
 	 * @param mixed $func The function object
+	 * @param mixed ...$args Arguments to the function
 	 */
-	abstract public function callFunction( $func /*...*/ );
+	abstract public function callFunction( $func, ...$args );
 
 	/**
 	 * Wrap a PHP callable as a Lua function, which can be passed back into
diff --git a/includes/engines/LuaSandbox/Engine.php b/includes/engines/LuaSandbox/Engine.php
index ec323d11..bb49c058 100644
--- a/includes/engines/LuaSandbox/Engine.php
+++ b/includes/engines/LuaSandbox/Engine.php
@@ -309,9 +309,7 @@ class Scribunto_LuaSandboxInterpreter extends Scribunto_LuaInterpreter {
 		# 	$name, [ $this, 'callback' ], $functions );
 	}
 
-	public function callFunction( $func /*, ... */ ) {
-		$args = func_get_args();
-		$func = array_shift( $args );
+	public function callFunction( $func, ...$args ) {
 		try {
 			$ret = $func->call( ...$args );
 			if ( $ret === false ) {
diff --git a/includes/engines/LuaStandalone/LuaStandaloneEngine.php b/includes/engines/LuaStandalone/LuaStandaloneEngine.php
index 765312fb..7295aa76 100644
--- a/includes/engines/LuaStandalone/LuaStandaloneEngine.php
+++ b/includes/engines/LuaStandalone/LuaStandaloneEngine.php
@@ -354,7 +354,7 @@ class Scribunto_LuaStandaloneInterpreter extends Scribunto_LuaInterpreter {
 		return new Scribunto_LuaStandaloneInterpreterFunction( $this->id, $result[1] );
 	}
 
-	public function callFunction( $func /* ... */ ) {
+	public function callFunction( $func, ...$args ) {
 		if ( !( $func instanceof Scribunto_LuaStandaloneInterpreterFunction ) ) {
 			throw new MWException( __METHOD__ . ': invalid function type' );
 		}