diff --git a/qemu/target/arm/translate.c b/qemu/target/arm/translate.c
index 1a08c39d..c46b0801 100644
--- a/qemu/target/arm/translate.c
+++ b/qemu/target/arm/translate.c
@@ -151,6 +151,10 @@ static inline int get_a32_user_mem_index(DisasContext *s)
     case ARMMMUIdx_MPriv:
     case ARMMMUIdx_MNegPri:
         return arm_to_core_mmu_idx(ARMMMUIdx_MUser);
+    case ARMMMUIdx_MSUser:
+    case ARMMMUIdx_MSPriv:
+    case ARMMMUIdx_MSNegPri:
+        return arm_to_core_mmu_idx(ARMMMUIdx_MSUser);
     case ARMMMUIdx_S2NS:
     default:
         g_assert_not_reached();