diff --git a/src/de/inetsoftware/jwebassembly/module/JavaMethodWasmCodeBuilder.java b/src/de/inetsoftware/jwebassembly/module/JavaMethodWasmCodeBuilder.java
index 1845954..e956c14 100644
--- a/src/de/inetsoftware/jwebassembly/module/JavaMethodWasmCodeBuilder.java
+++ b/src/de/inetsoftware/jwebassembly/module/JavaMethodWasmCodeBuilder.java
@@ -352,11 +352,11 @@ class JavaMethodWasmCodeBuilder extends WasmCodeBuilder {
                         break;
                     case 114: // frem
                         //helper function like: (a - (int)(a / b) * (float)b) 
-                        addCallInstruction( new SyntheticFunctionName( "frem", "local.get 0 local.get 0 local.get 1 f32.div i32.trunc_sat_f32_s f32.convert_i32_s local.get 1 f32.mul f32.sub return", ValueType.f32, ValueType.f32, null, ValueType.f32 ), codePos, lineNumber );
+                        addCallInstruction( new WatCodeSyntheticFunctionName( "frem", "local.get 0 local.get 0 local.get 1 f32.div i32.trunc_sat_f32_s f32.convert_i32_s local.get 1 f32.mul f32.sub return", ValueType.f32, ValueType.f32, null, ValueType.f32 ), codePos, lineNumber );
                         break;
                     case 115: // drem
                         //helper function like: (a - (long)(a / b) * (double)b) 
-                        addCallInstruction( new SyntheticFunctionName( "drem", "local.get 0 local.get 0 local.get 1 f64.div i64.trunc_sat_f64_s f64.convert_i64_s local.get 1 f64.mul f64.sub return", ValueType.f64, ValueType.f64, null, ValueType.f64 ), codePos, lineNumber );
+                        addCallInstruction( new WatCodeSyntheticFunctionName( "drem", "local.get 0 local.get 0 local.get 1 f64.div i64.trunc_sat_f64_s f64.convert_i64_s local.get 1 f64.mul f64.sub return", ValueType.f64, ValueType.f64, null, ValueType.f64 ), codePos, lineNumber );
                         break;
                     case 116: // ineg
                         addConstInstruction( -1, ValueType.i32, codePos, lineNumber );
diff --git a/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java b/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java
index 69a8652..edaa3cc 100644
--- a/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java
+++ b/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java
@@ -164,8 +164,7 @@ public class ModuleGenerator {
             InputStream stream = libraries.getResourceAsStream( next.className + ".class" );
             if( stream == null ) {
                 if( next instanceof SyntheticFunctionName ) {
-                    watParser.parse( ((SyntheticFunctionName)next).getCode(), -1 );
-                    writeMethodImpl( next, true, watParser );
+                    writeMethodImpl( next, true, ((SyntheticFunctionName)next).getCodeBuilder( watParser ) );
                 } else {
                     throw new WasmException( "Missing function: " + next.signatureName, -1 );
                 }
diff --git a/src/de/inetsoftware/jwebassembly/module/SyntheticFunctionName.java b/src/de/inetsoftware/jwebassembly/module/SyntheticFunctionName.java
index 19f2988..c9ec9a6 100644
--- a/src/de/inetsoftware/jwebassembly/module/SyntheticFunctionName.java
+++ b/src/de/inetsoftware/jwebassembly/module/SyntheticFunctionName.java
@@ -20,32 +20,28 @@ import java.util.Arrays;
 import java.util.Iterator;
 
 import de.inetsoftware.jwebassembly.wasm.AnyType;
+import de.inetsoftware.jwebassembly.watparser.WatParser;
 
 /**
  * Synthetic/dynamic method.
  * 
  * @author Volker Berlin
  */
-public class SyntheticFunctionName extends FunctionName {
+abstract class SyntheticFunctionName extends FunctionName {
 
     private final AnyType[] signature;
 
-    private final String    code;
-
     /**
      * Create a new instance.
      * 
      * @param name
      *            the function name
-     * @param code
-     *            the WAT code (WASM in text form)
      * @param signature
      *            the method signature, first the parameters, then null and the the return types
      */
-    public SyntheticFunctionName( String name, String code, AnyType... signature ) {
+    public SyntheticFunctionName( String name, AnyType... signature ) {
         super( "", name, "()V" ); //TODO better signature name
         this.signature = signature;
-        this.code = code;
     }
 
     /**
@@ -57,11 +53,10 @@ public class SyntheticFunctionName extends FunctionName {
     }
 
     /**
-     * Get the WAT code (WASM in text form)
+     * Get the WasmCodeBuilder.
      * 
+     * @param watParser a helping WatParser
      * @return the code
      */
-    public String getCode() {
-        return code;
-    }
+    abstract WasmCodeBuilder getCodeBuilder( WatParser watParser );
 }
diff --git a/src/de/inetsoftware/jwebassembly/module/WatCodeSyntheticFunctionName.java b/src/de/inetsoftware/jwebassembly/module/WatCodeSyntheticFunctionName.java
new file mode 100644
index 0000000..0807dc9
--- /dev/null
+++ b/src/de/inetsoftware/jwebassembly/module/WatCodeSyntheticFunctionName.java
@@ -0,0 +1,54 @@
+/*
+   Copyright 2019 Volker Berlin (i-net software)
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+*/
+package de.inetsoftware.jwebassembly.module;
+
+import de.inetsoftware.jwebassembly.wasm.AnyType;
+import de.inetsoftware.jwebassembly.watparser.WatParser;
+
+/**
+ * Synthetic/dynamic method based on WAT code (WASM in text form).
+ * 
+ * @author Volker Berlin
+ */
+class WatCodeSyntheticFunctionName extends SyntheticFunctionName {
+
+    private final String    code;
+
+    /**
+     * Create a new instance.
+     * 
+     * @param name
+     *            the function name
+     * @param code
+     *            the WAT code (WASM in text form)
+     * @param signature
+     *            the method signature, first the parameters, then null and the the return types
+     */
+    public WatCodeSyntheticFunctionName( String name, String code, AnyType... signature ) {
+        super( name, signature );
+        this.code = code;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public WasmCodeBuilder getCodeBuilder( WatParser watParser ) {
+        watParser.parse( code, -1 );
+        return watParser;
+    }
+}