diff --git a/man/man3/bio.3 b/man/man3/bio.3
index 3c66b57a..0c48bea6 100644
--- a/man/man3/bio.3
+++ b/man/man3/bio.3
@@ -287,7 +287,7 @@ a negative value
 is returned.
 Otherwise, 
 .I Bprint
-returns zero.
+returns the number of bytes written.
 .I Bvprint
 does the same except it takes as argument a
 .B va_list