diff --git a/src/Generator/Generators/CSharp/CSharpMarshal.cs b/src/Generator/Generators/CSharp/CSharpMarshal.cs
index 08de1719..b228c0d5 100644
--- a/src/Generator/Generators/CSharp/CSharpMarshal.cs
+++ b/src/Generator/Generators/CSharp/CSharpMarshal.cs
@@ -344,8 +344,9 @@ namespace CppSharp.Generators.CSharp
             var pointee = pointer.Pointee;
 
             Type type = pointee.Desugar();
-            if (type.IsPrimitiveType(PrimitiveType.Char) ||
-                type.IsPrimitiveType(PrimitiveType.WideChar))
+            if ((type.IsPrimitiveType(PrimitiveType.Char) ||
+                type.IsPrimitiveType(PrimitiveType.WideChar)) &&
+                pointer.QualifiedPointee.Qualifiers.IsConst)
             {
                 Context.Return.Write("Marshal.StringToHGlobalAnsi({0})",
                     Helpers.SafeIdentifier(Context.Parameter.Name));
diff --git a/tests/Basic/Basic.cpp b/tests/Basic/Basic.cpp
index 5e3bbfe0..7f6242f5 100644
--- a/tests/Basic/Basic.cpp
+++ b/tests/Basic/Basic.cpp
@@ -71,7 +71,7 @@ int Hello::RetEnum(Enum e)
     return (int)e;
 }
 
-int unsafeFunction(const Bar& ret)
+int unsafeFunction(const Bar& ret, char* testForString)
 {
     return ret.A;
 }
@@ -82,4 +82,4 @@ Bar operator+(const Bar& b1, const Bar& b2)
     b.A = b1.A + b2.A;
     b.B = b1.B + b2.B;
     return b;
-}
\ No newline at end of file
+}
diff --git a/tests/Basic/Basic.h b/tests/Basic/Basic.h
index 1158d450..11334939 100644
--- a/tests/Basic/Basic.h
+++ b/tests/Basic/Basic.h
@@ -73,4 +73,4 @@ public:
 
 DLL_API Bar operator+(const Bar &, const Bar &);
 
-int DLL_API unsafeFunction(const Bar& ret);
+int DLL_API unsafeFunction(const Bar& ret, char* testForString);