diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
index abc5b6b411..d748dd2787 100644
--- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
+++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
@@ -19,16 +19,16 @@
 #ifndef _CLOCKS_AM33XX_H_
 #define _CLOCKS_AM33XX_H_
 
-#define OSC	24
+#define OSC	(V_OSCK/1000000)
 
 /* MAIN PLL Fdll = 550 MHZ, */
 #define MPUPLL_M	550
-#define MPUPLL_N	23
+#define MPUPLL_N	(OSC-1)
 #define MPUPLL_M2	1
 
 /* Core PLL Fdll = 1 GHZ, */
 #define COREPLL_M	1000
-#define COREPLL_N	23
+#define COREPLL_N	(OSC-1)
 
 #define COREPLL_M4	10	/* CORE_CLKOUTM4 = 200 MHZ */
 #define COREPLL_M5	8	/* CORE_CLKOUTM5 = 250 MHZ */
@@ -40,13 +40,13 @@
  * For clkout = 192 MHZ, Fdll = 960 MHZ, divider values are given below
  */
 #define PERPLL_M	960
-#define PERPLL_N	23
+#define PERPLL_N	(OSC-1)
 #define PERPLL_M2	5
 
 /* DDR Freq is 266 MHZ for now */
 /* Set Fdll = 400 MHZ , Fdll = M * 2 * CLKINP/ N + 1; clkout = Fdll /(2 * M2) */
 #define DDRPLL_M	266
-#define DDRPLL_N	23
+#define DDRPLL_N	(OSC-1)
 #define DDRPLL_M2	1
 
 extern void pll_init(void);