diff --git a/hawk/lib/hawk-utl.h b/hawk/lib/hawk-utl.h
index 2d1fc514..eaeebfb1 100644
--- a/hawk/lib/hawk-utl.h
+++ b/hawk/lib/hawk-utl.h
@@ -540,14 +540,14 @@ HAWK_EXPORT hawk_oow_t hawk_copy_bcstr (
 
 HAWK_EXPORT hawk_oow_t hawk_copy_uchars_to_ucstr (
 	hawk_uch_t*       dst,
-	hawk_uch_t        dlen,
+	hawk_oow_t        dlen,
 	const hawk_uch_t* src,
 	hawk_oow_t        slen
 );
 
 HAWK_EXPORT hawk_oow_t hawk_copy_bchars_to_bcstr (
 	hawk_bch_t*       dst,
-	hawk_bch_t        dlen,
+	hawk_oow_t        dlen,
 	const hawk_bch_t* src,
 	hawk_oow_t        slen
 );
diff --git a/hawk/lib/utl-str.c b/hawk/lib/utl-str.c
index cc8f33f0..e4288bfb 100644
--- a/hawk/lib/utl-str.c
+++ b/hawk/lib/utl-str.c
@@ -339,7 +339,7 @@ void hawk_copy_uchars_to_bchars (hawk_bch_t* dst, const hawk_uch_t* src, hawk_oo
 	for (i = 0; i < len; i++) dst[i] = src[i];
 }
 
-hawk_oow_t hawk_copy_uchars_to_ucstr (hawk_uch_t* dst, hawk_uch_t dlen, const hawk_uch_t* src, hawk_oow_t slen)
+hawk_oow_t hawk_copy_uchars_to_ucstr (hawk_uch_t* dst, hawk_oow_t dlen, const hawk_uch_t* src, hawk_oow_t slen)
 {
 	hawk_oow_t i;
 	if (dlen <= 0) return 0;
@@ -349,7 +349,7 @@ hawk_oow_t hawk_copy_uchars_to_ucstr (hawk_uch_t* dst, hawk_uch_t dlen, const ha
 	return i;
 }
 
-hawk_oow_t hawk_copy_bchars_to_bcstr (hawk_bch_t* dst, hawk_bch_t dlen, const hawk_bch_t* src, hawk_oow_t slen)
+hawk_oow_t hawk_copy_bchars_to_bcstr (hawk_bch_t* dst, hawk_oow_t dlen, const hawk_bch_t* src, hawk_oow_t slen)
 {
 	hawk_oow_t i;
 	if (dlen <= 0) return 0;