diff --git a/drivers/clk/clk_zynqmp.c b/drivers/clk/clk_zynqmp.c
index a9e4500..167f3f7 100644
--- a/drivers/clk/clk_zynqmp.c
+++ b/drivers/clk/clk_zynqmp.c
@@ -103,6 +103,8 @@
 #define PLLCTRL_BYPASS_SHFT	3
 #define PLLCTRL_POST_SRC_SHFT	24
 #define PLLCTRL_POST_SRC_MASK	(0x7 << PLLCTRL_POST_SRC_SHFT)
+#define PLLCTRL_PRE_SRC_SHFT	20
+#define PLLCTRL_PRE_SRC_MASK	(0x7 << PLLCTRL_PRE_SRC_SHFT)
 
 
 #define NUM_MIO_PINS	77
@@ -310,8 +312,8 @@
 	u32 src_sel;
 
 	if (is_pre_src)
-		src_sel = (clk_ctrl & PLLCTRL_POST_SRC_MASK) >>
-			   PLLCTRL_POST_SRC_SHFT;
+		src_sel = (clk_ctrl & PLLCTRL_PRE_SRC_MASK) >>
+			   PLLCTRL_PRE_SRC_SHFT;
 	else
 		src_sel = (clk_ctrl & PLLCTRL_POST_SRC_MASK) >>
 			   PLLCTRL_POST_SRC_SHFT;