diff --git a/cube/patches/base/common.h b/cube/patches/base/common.h
index b67baa0d..9e4c294a 100644
--- a/cube/patches/base/common.h
+++ b/cube/patches/base/common.h
@@ -40,7 +40,10 @@ typedef volatile f64 vf64;
 	unsigned long msr; \
 	asm volatile ("mfmsr %0" : "=r" (msr)); \
 	asm volatile ("ori %0,%0,0x8000" : "+r" (msr)); \
+	asm volatile ("oris %0,%0,0x0004" : "+r" (msr)); \
+	asm volatile ("sync"); \
 	asm volatile ("mtmsr %0" :: "r" (msr)); \
+	asm volatile ("isync"); \
 })
 
 extern volatile u16 PE[24];