diff --git a/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java b/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java
index b399a87..1569391 100644
--- a/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java
+++ b/src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java
@@ -116,7 +116,6 @@ public class ModuleGenerator {
         scanLibraries( libraries );
 
         //register some synthetic functions
-        strings.getStringConstantFunction();
         types.getTypeTableMemoryOffsetFunctionName();
     }
 
diff --git a/src/de/inetsoftware/jwebassembly/module/StringManager.java b/src/de/inetsoftware/jwebassembly/module/StringManager.java
index af785a0..a48bb7c 100644
--- a/src/de/inetsoftware/jwebassembly/module/StringManager.java
+++ b/src/de/inetsoftware/jwebassembly/module/StringManager.java
@@ -82,7 +82,8 @@ public class StringManager extends LinkedHashMap<String, Integer> {
                                     return "i32.const " + stringMemoryOffset;
                                 }
                             };
-            functions.addReplacement( offsetFunction, null );
+            functions.markAsNeededAndReplaceIfExists( offsetFunction );
+            functions.markAsNeeded( stringConstantFunction, false );
         }
 
         return stringConstantFunction;