diff --git a/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.c b/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.c
index b5088747..5bce0c2a 100644
--- a/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.c
+++ b/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.c
@@ -53,6 +53,8 @@
 *			to fix CR #693371
 * 2.1   bss    08/05/14	Modified Assert for XAdcPs_SetSingleChParams to fix
 *			CR #807563.
+* 2.1	bss	   04/27/14 Modified to use correct Device Config base address
+*						(CR#854437).
 * </pre>
 *
 *****************************************************************************/
@@ -117,7 +119,7 @@ int XAdcPs_CfgInitialize(XAdcPs *InstancePtr, XAdcPs_Config *ConfigPtr,
 	InstancePtr->Config.BaseAddress = EffectiveAddr;
 
 	/* Write Unlock value to Device Config Unlock register */
-	XAdcPs_WriteReg((InstancePtr)->Config.BaseAddress,
+	XAdcPs_WriteReg(XPAR_XDCFG_0_BASEADDR,
 				XADCPS_UNLK_OFFSET, XADCPS_UNLK_VALUE);
 
 	/* Enable the PS access of xadc and set FIFO thresholds */
diff --git a/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.h b/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.h
index 427217ab..e153cd7d 100644
--- a/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.h
+++ b/XilinxProcessorIPLib/drivers/xadcps/src/xadcps.h
@@ -165,6 +165,9 @@
 *			functions.
 *			Modified Assert for XAdcPs_SetSingleChParams in
 *			xadcps.c to fix CR #807563.
+* 2.1   bss    04/27/14 Modified to use correct Device Config base address in
+*						xadcps.c (CR#854437).
+*
 *
 * </pre>
 *