diff --git a/src/tools/opensc-explorer.c b/src/tools/opensc-explorer.c
index 44e18043..16be202a 100644
--- a/src/tools/opensc-explorer.c
+++ b/src/tools/opensc-explorer.c
@@ -1712,6 +1712,9 @@ static int do_random(int argc, char **argv)
 	sc_unlock(card);
 	if (r < 0) {
 		fprintf(stderr, "Failed to get random bytes: %s\n", sc_strerror(r));
+		if (argc == 2) {
+			fclose(outf);
+		}
 		return -1;
 	}