1 files changed, 1 insertions, 1 deletions

diff --git a/src/AFC.c b/src/AFC.c
index c97141c..a2edae7 100644
--- a/src/AFC.c
+++ b/src/AFC.c
@@ -742,7 +742,7 @@ afc_file_read(afc_client_t client, uint64_t handle, char *data, int length, uint
         const int MAXIMUM_READ_SIZE = 1 << 16;
         afc_error_t ret = AFC_E_SUCCESS;
 
-        if (!client || !client->afc_packet || !client->connection || handle == 0)
+        if (!client || !client->afc_packet || !client->connection || handle == 0 || (length < 0))
                 return AFC_E_INVALID_ARGUMENT;
         log_debug_msg("%s: called for length %i\n", __func__, length);