diff --git a/src/iri.c b/src/iri.c

index 7dcf3ac..1c8695c 100644

--- a/src/iri.c

+++ b/src/iri.c

@@ -189,9 +189,10 @@ do_conversion (const char *tocode, const char *fromcode, char const *in_org, siz

         {

           tooshort++;

           done = len;

-          len = outlen = done + inlen * 2;

-          s = xrealloc (s, outlen + 1);

-          *out = s + done;

+          len = done + inlen * 2;

+          s = xrealloc (s, len + 1);

+          *out = s + done - outlen;

+          outlen += inlen * 2;

         }

       else /* Weird, we got an unspecified error */

         {