diff --git a/qemu/target/arm/cpu.c b/qemu/target/arm/cpu.c
index bedff6c7..f5f5f419 100644
--- a/qemu/target/arm/cpu.c
+++ b/qemu/target/arm/cpu.c
@@ -864,6 +864,7 @@ static void cortex_m3_initfn(struct uc_struct *uc, Object *obj, void *opaque)
     set_feature(&cpu->env, ARM_FEATURE_V7);
     set_feature(&cpu->env, ARM_FEATURE_M);
     cpu->midr = 0x410fc231;
+    cpu->pmsav7_dregion = 8;
 }
 
 static void cortex_m4_initfn(struct uc_struct *uc, Object *obj, void *opaque)
@@ -874,6 +875,7 @@ static void cortex_m4_initfn(struct uc_struct *uc, Object *obj, void *opaque)
     set_feature(&cpu->env, ARM_FEATURE_M);
     set_feature(&cpu->env, ARM_FEATURE_THUMB_DSP);
     cpu->midr = 0x410fc240; /* r0p0 */
+    cpu->pmsav7_dregion = 8;
 }
 
 static void arm_v7m_class_init(struct uc_struct *uc, ObjectClass *oc, void *data)