diff --git a/sys/arch/powerpc/include/oea/vmparam.h b/sys/arch/powerpc/include/oea/vmparam.h
index 92a0cdffaae6..f5ab0d3a937b 100644
--- a/sys/arch/powerpc/include/oea/vmparam.h
+++ b/sys/arch/powerpc/include/oea/vmparam.h
@@ -74,7 +74,7 @@
 #endif
 
 #ifndef	DFLDSIZ
-#define	DFLDSIZ			(128*1024*1024)		/* default data size */
+#define	DFLDSIZ			(256*1024*1024)		/* default data size */
 #endif
 
 #ifndef	DFLSSIZ