diff --git a/target/ppc/mem_helper.c b/target/ppc/mem_helper.c
index f88155ad45..361fd72226 100644
--- a/target/ppc/mem_helper.c
+++ b/target/ppc/mem_helper.c
@@ -271,12 +271,11 @@ void helper_stsw(CPUPPCState *env, target_ulong addr, uint32_t nb,
 }
 
 static void dcbz_common(CPUPPCState *env, target_ulong addr,
-                        uint32_t opcode, bool epid, uintptr_t retaddr)
+                        uint32_t opcode, int mmu_idx, uintptr_t retaddr)
 {
     target_ulong mask, dcbz_size = env->dcache_line_size;
     uint32_t i;
     void *haddr;
-    int mmu_idx = epid ? PPC_TLB_EPID_STORE : ppc_env_mmu_index(env, false);
 
 #if defined(TARGET_PPC64)
     /* Check for dcbz vs dcbzl on 970 */
@@ -309,12 +308,12 @@ static void dcbz_common(CPUPPCState *env, target_ulong addr,
 
 void helper_dcbz(CPUPPCState *env, target_ulong addr, uint32_t opcode)
 {
-    dcbz_common(env, addr, opcode, false, GETPC());
+    dcbz_common(env, addr, opcode, ppc_env_mmu_index(env, false), GETPC());
 }
 
 void helper_dcbzep(CPUPPCState *env, target_ulong addr, uint32_t opcode)
 {
-    dcbz_common(env, addr, opcode, true, GETPC());
+    dcbz_common(env, addr, opcode, PPC_TLB_EPID_STORE, GETPC());
 }
 
 void helper_icbi(CPUPPCState *env, target_ulong addr)