diff --git a/include/configs/balloon3.h b/include/configs/balloon3.h
index 8dabc809747b358f5f671c42c00831e5a3df3ce1..f20a631f0b5a33b5c064c2927730e7033ba4519e 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 2fb91a8f8c1fdbf7248e225e3d1fbd625817c701..e54601d4dde15dc815e56b6802f8afac0812dd86 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