diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index deba12f4f3..7d89bd0651 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -469,7 +469,6 @@ static void powerpc_excp_40x(PowerPCCPU *cpu, int excp)
         break;
     case POWERPC_EXCP_ISI:       /* Instruction storage exception            */
         trace_ppc_excp_isi(msr, env->nip);
-        msr |= env->error_code;
         break;
     case POWERPC_EXCP_EXTERNAL:  /* External input                           */
         break;