diff --git a/src/slab.c b/src/slab.c
index e10c287..a3b7115 100644
--- a/src/slab.c
+++ b/src/slab.c
@@ -13,7 +13,7 @@
 struct slab_unit {
 	uint32_t leased;
 	uint32_t canary;
-	uint8_t data[0];
+	uint8_t data[];
 } __packed;
 
 int slab_init(slab_t *slab, size_t slab_size,