diff --git a/include/configs/balloon3.h b/include/configs/balloon3.h
index 8dabc80974..f20a631f0b 100644
--- a/include/configs/balloon3.h
+++ b/include/configs/balloon3.h
@@ -190,7 +190,6 @@
 #define	CONFIG_SYS_MDMRS_VAL	0x00220022
 #define	CONFIG_SYS_FLYCNFG_VAL	0x00000000
 #define	CONFIG_SYS_SXCNFG_VAL	0x00000000
-#define	CONFIG_SYS_MEM_BUF_IMP	0x0f
 
 /*
  * PCMCIA and CF Interfaces
diff --git a/include/configs/vpac270.h b/include/configs/vpac270.h
index 2fb91a8f8c..e54601d4dd 100644
--- a/include/configs/vpac270.h
+++ b/include/configs/vpac270.h
@@ -297,7 +297,6 @@
 #define	CONFIG_SYS_MDMRS_VAL	0x00000000
 #define	CONFIG_SYS_FLYCNFG_VAL	0x00000000
 #define	CONFIG_SYS_SXCNFG_VAL	0x40044004
-#define	CONFIG_SYS_MEM_BUF_IMP	0x0f
 
 /*
  * PCMCIA and CF Interfaces