diff --git a/module/zfs/vdev_raidz.c b/module/zfs/vdev_raidz.c
index 6d6f166ca1..8ff647adf3 100644
--- a/module/zfs/vdev_raidz.c
+++ b/module/zfs/vdev_raidz.c
@@ -1002,7 +1002,7 @@ vdev_raidz_matrix_reconstruct(raidz_map_t *rm, int n, int nmissing,
 	uint64_t ccount;
 	uint8_t *dst[VDEV_RAIDZ_MAXPARITY];
 	uint64_t dcount[VDEV_RAIDZ_MAXPARITY];
-	uint8_t log, val;
+	uint8_t log = 0, val;
 	int ll;
 	uint8_t *invlog[VDEV_RAIDZ_MAXPARITY];
 	uint8_t *p, *pp;