diff --git a/src/northbridge/intel/e7505/raminit.c b/src/northbridge/intel/e7505/raminit.c
index 4822ead..4a8cf90 100644
--- a/src/northbridge/intel/e7505/raminit.c
+++ b/src/northbridge/intel/e7505/raminit.c
@@ -92,7 +92,7 @@
 	1, 7, 2, 1, 1, 3
 };
 
-#define MAX_SPD_REFRESH_RATE ((sizeof(refresh_rate_map) / sizeof(uint32_t)) - 1)
+#define MAX_SPD_REFRESH_RATE (ARRAY_SIZE(refresh_rate_map) - 1)
 
 // SPD parameters that must match for dual-channel operation
 static const uint8_t dual_channel_parameters[] = {
diff --git a/src/northbridge/intel/ironlake/raminit.c b/src/northbridge/intel/ironlake/raminit.c
index c3d1b0d..407be55 100644
--- a/src/northbridge/intel/ironlake/raminit.c
+++ b/src/northbridge/intel/ironlake/raminit.c
@@ -3770,8 +3770,7 @@
 					continue;
 				for (addr = 0;
 				     addr <
-				     sizeof(useful_addresses) /
-				     sizeof(useful_addresses[0]); addr++)
+				     ARRAY_SIZE(useful_addresses); addr++)
 					gav(info.
 					    spd[channel][0][useful_addresses
 							    [addr]] =