diff --git a/common/memsize.c b/common/memsize.c
index 6c275c9..505e43f 100644
--- a/common/memsize.c
+++ b/common/memsize.c
@@ -22,7 +22,7 @@
  */
 
 #include <config.h>
-#ifdef __PPC__
+#if defined (__PPC__) && !defined (__SANDBOX__)
 /*
  * At least on G2 PowerPC cores, sequential accesses to non-existent
  * memory must be synchronized.
diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h
index 25bb18f..c96d762 100644
--- a/include/configs/sandbox.h
+++ b/include/configs/sandbox.h
@@ -1,5 +1,6 @@
-
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#define __SANDBOX__
+
 #endif	/* __CONFIG_H */