diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index a5479c4505..4830dd9e7d 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -2080,7 +2080,6 @@ static inline void powerpc_excp(CPUState *env, int excp_model, int excp)
     srr1 = SPR_SRR1;
     asrr0 = -1;
     asrr1 = -1;
-    msr &= ~((target_ulong)0x783F0000);
     switch (excp) {
     case POWERPC_EXCP_NONE:
         /* Should never happen */
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index 8f2ee986bb..3c3aa60bc3 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -1646,20 +1646,20 @@ static inline void do_rfi(target_ulong nip, target_ulong msr,
 void helper_rfi (void)
 {
     do_rfi(env->spr[SPR_SRR0], env->spr[SPR_SRR1],
-           ~((target_ulong)0x0), 1);
+           ~((target_ulong)0x783F0000), 1);
 }
 
 #if defined(TARGET_PPC64)
 void helper_rfid (void)
 {
     do_rfi(env->spr[SPR_SRR0], env->spr[SPR_SRR1],
-           ~((target_ulong)0x0), 0);
+           ~((target_ulong)0x783F0000), 0);
 }
 
 void helper_hrfid (void)
 {
     do_rfi(env->spr[SPR_HSRR0], env->spr[SPR_HSRR1],
-           ~((target_ulong)0x0), 0);
+           ~((target_ulong)0x783F0000), 0);
 }
 #endif
 #endif