diff --git a/src/normal.c b/src/normal.c
index 39643ba..cb496dd 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -379,7 +379,7 @@
 };
 
 // Number of commands in nv_cmds[].
-#define NV_CMDS_SIZE (sizeof(nv_cmds) / sizeof(struct nv_cmd))
+#define NV_CMDS_SIZE ARRAY_LENGTH(nv_cmds)
 
 // Sorted index of commands in nv_cmds[].
 static short nv_cmd_idx[NV_CMDS_SIZE];