diff --git a/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java b/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java
index faa076f..cd3ce72 100644
--- a/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java
+++ b/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java
@@ -207,6 +207,16 @@ class ReplacementForClass<T> {
     @WasmTextCode( "unreachable" ) // TODO
     public native boolean isInstance( Object obj );
 
+    /**
+     * Replacement of the Java method isAssignableFrom()
+     * 
+     * @param cls
+     *            the class to check
+     * @return true, if type {@code cls} can be assigned to objects of this class
+     */
+    @WasmTextCode( "unreachable" ) // TODO
+    public native boolean isAssignableFrom( Class<?> cls );
+
     /**
      * Replacement of the Java method isArray()
      * @return {@code true} if this object represents an array class;