diff --git a/board/freescale-mx25-3-stack/3stack.c b/board/freescale-mx25-3-stack/3stack.c
index 3acc46b..3ee87e3 100644
--- a/board/freescale-mx25-3-stack/3stack.c
+++ b/board/freescale-mx25-3-stack/3stack.c
@@ -89,7 +89,7 @@
 
 static struct device_d fec_dev = {
 	.name     = "fec_imx",
-	.map_base = 0x50038000,
+	.map_base = IMX_FEC_BASE,
 	.platform_data	= &fec_info,
 };
 
diff --git a/board/pcm043/pcm043.c b/board/pcm043/pcm043.c
index a396ff7..24a2851 100644
--- a/board/pcm043/pcm043.c
+++ b/board/pcm043/pcm043.c
@@ -63,7 +63,7 @@
 
 static struct device_d fec_dev = {
 	.name     = "fec_imx",
-	.map_base = 0x50038000,
+	.map_base = IMX_FEC_BASE,
 	.platform_data	= &fec_info,
 };