diff --git a/nanddump.c b/nanddump.c
index 709b2db..ba370ad 100644
--- a/nanddump.c
+++ b/nanddump.c
@@ -374,6 +374,7 @@ int main(int argc, char * const argv[])
                close(fd);
                exit(EXIT_FAILURE);
        }
+       errno = 0;

        /* Initialize start/end addresses and block size */
        if (length)