diff --git a/board/esd/pmc440/pmc440.c b/board/esd/pmc440/pmc440.c
index c907b85..8238c33 100644
--- a/board/esd/pmc440/pmc440.c
+++ b/board/esd/pmc440/pmc440.c
@@ -426,8 +426,8 @@
 	 * This fix will make the MAL burst disabling patch for the Linux
 	 * EMAC driver obsolete.
 	 */
-	reg = mfdcr(PLB4_ACR) & ~PLB4_ACR_WRP;
-	mtdcr(PLB4_ACR, reg);
+	reg = mfdcr(PLB4A0_ACR) & ~PLB4Ax_ACR_WRP_MASK;
+	mtdcr(PLB4A0_ACR, reg);
 
 #ifdef CONFIG_FPGA
 	pmc440_init_fpga();