diff --git a/wcap/wcap-decode.c b/wcap/wcap-decode.c
index f7cabe3e..2b9304dd 100644
--- a/wcap/wcap-decode.c
+++ b/wcap/wcap-decode.c
@@ -144,6 +144,7 @@ void
 wcap_decoder_destroy(struct wcap_decoder *decoder)
 {
 	munmap(decoder->map, decoder->size);
+	close(decoder->fd);
 	free(decoder->frame);
 	free(decoder);
 }