diff --git a/arch/arm/include/asm/arch-kirkwood/config.h b/arch/arm/include/asm/arch-kirkwood/config.h
index 91164eb4021a10f9f77a0e97c8de8b0e3c2bbaf0..a9499b70cd37421d922dab4714d3c1c8b24eb55e 100644
--- a/arch/arm/include/asm/arch-kirkwood/config.h
+++ b/arch/arm/include/asm/arch-kirkwood/config.h
@@ -82,9 +82,15 @@
 #ifdef CONFIG_CMD_SF
 #define CONFIG_HARD_SPI			1
 #define CONFIG_KIRKWOOD_SPI		1
-#define CONFIG_ENV_SPI_BUS		0
-#define CONFIG_ENV_SPI_CS		0
-#define CONFIG_ENV_SPI_MAX_HZ		50000000	/*50Mhz */
+#ifndef CONFIG_ENV_SPI_BUS
+# define CONFIG_ENV_SPI_BUS		0
+#endif
+#ifndef CONFIG_ENV_SPI_CS
+# define CONFIG_ENV_SPI_CS		0
+#endif
+#ifndef CONFIG_ENV_SPI_MAX_HZ
+# define CONFIG_ENV_SPI_MAX_HZ		50000000
+#endif
 #endif
 
 /*