1 files changed, 1 insertions, 1 deletions

diff --git a/ot_iovec.h b/ot_iovec.h
index 5dbe706..e48008e 100644
--- a/ot_iovec.h
+++ b/ot_iovec.h
@@ -12,7 +12,7 @@ void  *iovec_increase( int *iovec_entries, struct iovec **iovector, size_t new_a
 void   iovec_fixlast( int *iovec_entries, struct iovec **iovector, void *last_ptr );
 void   iovec_free( int *iovec_entries, struct iovec **iovector );
 
-size_t iovec_length( int *iovec_entries, struct iovec **iovector );
+size_t iovec_length( const int *iovec_entries, const struct iovec **iovector );
 
 void  *iovec_fix_increase_or_free( int *iovec_entries, struct iovec **iovector, void *last_ptr, size_t new_alloc );