diff --git a/src/buffer/buffer.c b/src/buffer/buffer.c
index ce91f2a..391476f 100644
--- a/src/buffer/buffer.c
+++ b/src/buffer/buffer.c
@@ -6,7 +6,7 @@
 /*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/12/12 12:39:58 by kcolin            #+#    #+#             */
-/*   Updated: 2025/03/10 18:45:34 by khais            ###   ########.fr       */
+/*   Updated: 2025/04/09 17:26:24 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -84,6 +84,8 @@ t_buffer	*ft_buffer_pushchar(t_buffer *buffer, char c)
 /*
 ** push buf to the end of buffer, growing buffer if needed.
 **
+** also adds an additional null byte to terminate the buffer.
+**
 ** the number of bytes to copy to buffer is n.
 ** returns buffer.
 ** in case of error, all memory is freed and null is returned.
@@ -92,7 +94,7 @@ t_buffer	*ft_buffer_push_buf(t_buffer *buffer, char *buf, size_t n)
 {
 	if (buffer == NULL)
 		return (NULL);
-	while (buffer->length + n > buffer->capacity)
+	while (buffer->length + n + 1 > buffer->capacity)
 	{
 		buffer = ft_buffer_grow(buffer);
 		if (buffer == NULL)
@@ -100,5 +102,6 @@ t_buffer	*ft_buffer_push_buf(t_buffer *buffer, char *buf, size_t n)
 	}
 	ft_memcpy(buffer->buffer + buffer->length, buf, n);
 	buffer->length += n;
+	buffer->buffer[buffer->length] = '\0';
 	return (buffer);
 }