diff --git a/post/lib_powerpc/cmpi.c b/post/lib_powerpc/cmpi.c
index 1a2fc3d..4160a2a 100644
--- a/post/lib_powerpc/cmpi.c
+++ b/post/lib_powerpc/cmpi.c
@@ -95,8 +95,7 @@
 	0x04
     },
 };
-static unsigned int cpu_post_cmpi_size =
-    sizeof (cpu_post_cmpi_table) / sizeof (struct cpu_post_cmpi_s);
+static unsigned int cpu_post_cmpi_size = ARRAY_SIZE(cpu_post_cmpi_table);
 
 int cpu_post_test_cmpi (void)
 {