diff --git a/arch/powerpc/include/asm/immap_512x.h b/arch/powerpc/include/asm/immap_512x.h
index 157e6b84f6..383e872cf0 100644
--- a/arch/powerpc/include/asm/immap_512x.h
+++ b/arch/powerpc/include/asm/immap_512x.h
@@ -227,7 +227,9 @@ typedef struct clk512x {
 #define CLOCK_SCCR2_IIM_EN		0x00080000
 
 /* SCFR1 System Clock Frequency Register 1 */
+#ifndef SCFR1_IPS_DIV
 #define SCFR1_IPS_DIV		0x3
+#endif
 #define SCFR1_IPS_DIV_MASK	0x03800000
 #define SCFR1_IPS_DIV_SHIFT	23