diff --git a/src/include/taler_util.h b/src/include/taler_util.h
index 8192ed87c..6c2948221 100644
--- a/src/include/taler_util.h
+++ b/src/include/taler_util.h
@@ -229,6 +229,16 @@ void
 TALER_OS_init (void);
 
 
+/**
+ * Re-encode string at @a inp to match RFC 8785 (section 3.2.2.2).
+ *
+ * @param[in,out] inp pointer to string to re-encode
+ * @return number of bytes in resulting @a inp
+ */
+size_t
+TALER_rfc8785encode (char **inp);
+
+
 /**
  * URL-encode a string according to rfc3986.
  *
diff --git a/src/util/util.c b/src/util/util.c
index 7cd4b0c35..82c5f7f39 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -258,12 +258,6 @@ lowdump (struct GNUNET_Buffer *buf,
 }
 
 
-/**
- * Re-encode string at @a inp to match RFC 8785 (section 3.2.2.2).
- *
- * @param[in,out] inp pointer to string to re-encode
- * @return number of bytes in resulting @a inp
- */
 size_t
 TALER_rfc8785encode (char **inp)
 {