diff --git a/hypervisor/arch/x86/guest/virq.c b/hypervisor/arch/x86/guest/virq.c
index a0451ec75..a1e021678 100644
--- a/hypervisor/arch/x86/guest/virq.c
+++ b/hypervisor/arch/x86/guest/virq.c
@@ -304,12 +304,6 @@ void vcpu_inject_ud(struct acrn_vcpu *vcpu)
 	(void)vcpu_queue_exception(vcpu, IDT_UD, 0);
 }
 
-/* Inject alignment check exception(#AC) to guest */
-void vcpu_inject_ac(struct acrn_vcpu *vcpu)
-{
-	(void)vcpu_queue_exception(vcpu, IDT_AC, 0);
-}
-
 /* Inject stack fault exception(#SS) to guest */
 void vcpu_inject_ss(struct acrn_vcpu *vcpu)
 {
diff --git a/hypervisor/include/arch/x86/irq.h b/hypervisor/include/arch/x86/irq.h
index 6abf23be6..1b2da09fc 100644
--- a/hypervisor/include/arch/x86/irq.h
+++ b/hypervisor/include/arch/x86/irq.h
@@ -199,17 +199,6 @@ void vcpu_inject_pf(struct acrn_vcpu *vcpu, uint64_t addr, uint32_t err_code);
  */
 void vcpu_inject_ud(struct acrn_vcpu *vcpu);
 
-/**
- * @brief Inject alignment check exeception(AC) to guest.
- *
- * @param[in] vcpu Pointer to vCPU.
- *
- * @return None
- *
- * @pre vcpu != NULL
- */
-void vcpu_inject_ac(struct acrn_vcpu *vcpu);
-
 /**
  * @brief Inject stack fault exeception(SS) to guest.
  *