diff --git a/SWIG/Source/Swig/swig.i b/SWIG/Source/Swig/swig.i
index 39557fb6d..33d174ddf 100644
--- a/SWIG/Source/Swig/swig.i
+++ b/SWIG/Source/Swig/swig.i
@@ -678,7 +678,7 @@ extern int SuperString_check(DOH *);
 
 %subsection "Strings"
 /* String constructor */
-extern DOH   *NewString(const char *c);
+extern DOH   *NewString(const DOH *c);
 /* Is this a string? */
 extern int    String_check(const DOH *);