diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 50b004d00d..5752ed4a4d 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -112,6 +112,8 @@ static uint64_t ppc_excp_vector_offset(CPUState *cs, int ail)
     uint64_t offset = 0;
 
     switch (ail) {
+    case AIL_NONE:
+        break;
     case AIL_0001_8000:
         offset = 0x18000;
         break;