diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 19c09c3b53..f630384891 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -14664,7 +14664,7 @@ static void aarch64_tr_init_disas_context(DisasContextBase *dcbase,
     dc->isar = &arm_cpu->isar;
     dc->condjmp = 0;
 
-    dc->aarch64 = 1;
+    dc->aarch64 = true;
     /* If we are coming from secure EL0 in a system with a 32-bit EL3, then
      * there is no secure EL1, so we route exceptions to EL3.
      */
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 38e7a38f28..6018fee2ef 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -9334,7 +9334,7 @@ static void arm_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     dc->isar = &cpu->isar;
     dc->condjmp = 0;
 
-    dc->aarch64 = 0;
+    dc->aarch64 = false;
     /* If we are coming from secure EL0 in a system with a 32-bit EL3, then
      * there is no secure EL1, so we route exceptions to EL3.
      */
diff --git a/target/arm/translate.h b/target/arm/translate.h
index 3a0db801d3..8b7dd1a4c0 100644
--- a/target/arm/translate.h
+++ b/target/arm/translate.h
@@ -59,12 +59,12 @@ typedef struct DisasContext {
      * so that top level loop can generate correct syndrome information.
      */
     uint32_t svc_imm;
-    int aarch64;
     int current_el;
     /* Debug target exception level for single-step exceptions */
     int debug_target_el;
     GHashTable *cp_regs;
     uint64_t features; /* CPU features bits */
+    bool aarch64;
     /* Because unallocated encodings generate different exception syndrome
      * information from traps due to FP being disabled, we can't do a single
      * "is fp access disabled" check at a high level in the decode tree.