diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index ae82a7a..baad8db 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -127,7 +127,9 @@
 #endif
 
 /* Total Size of Environment Sector */
-#define CONFIG_ENV_SIZE			(128 << 10)
+#ifndef CONFIG_ENV_SIZE
+# define CONFIG_ENV_SIZE			(128 << 10)
+#endif
 
 /* Allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE
@@ -135,7 +137,9 @@
 /* Environment */
 #ifndef CONFIG_ENV_IS_NOWHERE
 # define CONFIG_ENV_SECT_SIZE		CONFIG_ENV_SIZE
-# define CONFIG_ENV_OFFSET		0xE0000
+# ifndef CONFIG_ENV_OFFSET
+#  define CONFIG_ENV_OFFSET		0xE0000
+# endif
 #endif
 
 /* enable preboot to be loaded before CONFIG_BOOTDELAY */