diff --git a/capstone-rs/src/arch/arm.rs b/capstone-rs/src/arch/arm.rs
index c9d0c148..909d2c66 100644
--- a/capstone-rs/src/arch/arm.rs
+++ b/capstone-rs/src/arch/arm.rs
@@ -206,6 +206,11 @@ impl ArmInsnDetail<'_> {
     pub fn update_flags(&self) -> bool {
         self.0.update_flags
     }
+    
+    /// Whether this is a post-index writeback (only applicable when `writeback` is true)
+    pub fn post_index(&self) -> bool {
+        self.0.post_index
+    }
 
     /// Whether writeback is required
     pub fn writeback(&self) -> bool {
@@ -219,7 +224,7 @@ impl ArmInsnDetail<'_> {
 }
 
 impl_PartialEq_repr_fields!(ArmInsnDetail<'a> [ 'a ];
-    usermode, vector_size, vector_data, cps_mode, cps_flag, cc, update_flags, writeback,
+    usermode, vector_size, vector_data, cps_mode, cps_flag, cc, update_flags, post_index, writeback,
     mem_barrier, operands
 );
 
diff --git a/capstone-rs/src/arch/arm64.rs b/capstone-rs/src/arch/arm64.rs
index 11e97fd3..fe0b88fb 100644
--- a/capstone-rs/src/arch/arm64.rs
+++ b/capstone-rs/src/arch/arm64.rs
@@ -167,6 +167,11 @@ impl Arm64InsnDetail<'_> {
         self.0.update_flags
     }
 
+    /// Whether this is a post-index writeback (only applicable when `writeback` is true)
+    pub fn post_index(&self) -> bool {
+        self.0.post_index
+    }
+
     /// Whether writeback is required
     pub fn writeback(&self) -> bool {
         self.0.writeback
@@ -174,7 +179,7 @@ impl Arm64InsnDetail<'_> {
 }
 
 impl_PartialEq_repr_fields!(Arm64InsnDetail<'a> [ 'a ];
-    cc, update_flags, writeback, operands
+    cc, update_flags, post_index, writeback, operands
 );
 
 impl Arm64OpMem {
diff --git a/capstone-rs/src/test.rs b/capstone-rs/src/test.rs
index 2b3a66c5..c8fc2601 100644
--- a/capstone-rs/src/test.rs
+++ b/capstone-rs/src/test.rs
@@ -1186,6 +1186,92 @@ fn test_arch_arm_detail() {
     );
 }
 
+#[cfg(feature = "arch_arm")]
+#[test]
+fn test_arch_arm_writeback() {
+    let mut cs = Capstone::new()
+        .arm()
+        .mode(arm::ArchMode::Arm)
+        .build()
+        .unwrap();
+    cs.set_detail(true).unwrap();
+
+    // ldr r0, [r1]
+    // ldr r0, [r1], #4
+    // ldr r0, [r1, #4]!
+    let insns = cs
+        .disasm_all(
+            b"\x00\x00\x91\xe5\x04\x00\x91\xe4\x04\x00\xb1\xe5",
+            START_TEST_ADDR,
+        )
+        .expect("Failed to disassemble");
+    let insns: Vec<_> = insns.iter().collect();
+
+    let insn = insns[0];
+    let detail = cs.insn_detail(insn).expect("Could not get detail");
+    let arch_detail = detail.arch_detail();
+    let arm_detail = arch_detail.arm().expect("Failed to get arm detail");
+    assert_eq!(false, arm_detail.writeback());
+    assert_eq!(false, arm_detail.post_index());
+
+    let insn = insns[1];
+    let detail = cs.insn_detail(insn).expect("Could not get detail");
+    let arch_detail = detail.arch_detail();
+    let arm_detail = arch_detail.arm().expect("Failed to get arm detail");
+    assert_eq!(true, arm_detail.writeback());
+    assert_eq!(true, arm_detail.post_index());
+
+    let insn = insns[2];
+    let detail = cs.insn_detail(insn).expect("Could not get detail");
+    let arch_detail = detail.arch_detail();
+    let arm_detail = arch_detail.arm().expect("Failed to get arm detail");
+    assert_eq!(true, arm_detail.writeback());
+    assert_eq!(false, arm_detail.post_index());
+}
+
+#[cfg(feature = "arch_arm64")]
+#[test]
+fn test_arch_arm64_writeback() {
+    let mut cs = Capstone::new()
+        .arm64()
+        .mode(arm64::ArchMode::Arm)
+        .build()
+        .unwrap();
+    cs.set_detail(true).unwrap();
+
+    // ldr x0, [x19]
+    // ldr x8, [x16, #0x28]!
+    // ldp x24, x23, [sp], #0x40
+    let insns = cs
+        .disasm_all(
+            b"\x60\x02\x40\xf9\x08\x8e\x42\xf8\xf8\x5f\xc4\xa8",
+            START_TEST_ADDR,
+        )
+        .expect("Failed to disassemble");
+    let insns: Vec<_> = insns.iter().collect();
+
+    let insn = insns[0];
+    let detail = cs.insn_detail(insn).expect("Could not get detail");
+    let arch_detail = detail.arch_detail();
+    let arm64_detail = arch_detail.arm64().expect("Failed to get arm64 detail");
+    assert_eq!(false, arm64_detail.writeback());
+    assert_eq!(false, arm64_detail.post_index());
+
+    let insn = insns[1];
+    let detail = cs.insn_detail(insn).expect("Could not get detail");
+    let arch_detail = detail.arch_detail();
+    let arm64_detail = arch_detail.arm64().expect("Failed to get arm64 detail");
+    assert_eq!(true, arm64_detail.writeback());
+    assert_eq!(false, arm64_detail.post_index());
+
+    let insn = insns[2];
+    let detail = cs.insn_detail(insn).expect("Could not get detail");
+    let arch_detail = detail.arch_detail();
+    let arm64_detail = arch_detail.arm64().expect("Failed to get arm64 detail");
+    assert_eq!(true, arm64_detail.writeback());
+    assert_eq!(true, arm64_detail.post_index());
+}
+
 #[cfg(feature = "arch_arm64")]
 #[test]
 fn test_arch_arm64() {