diff --git a/include/zephyr/arch/x86/arch.h b/include/zephyr/arch/x86/arch.h
index f7e75b3aab6..d58411bb1b5 100644
--- a/include/zephyr/arch/x86/arch.h
+++ b/include/zephyr/arch/x86/arch.h
@@ -219,7 +219,7 @@ static ALWAYS_INLINE int sys_test_and_clear_bit(mem_addr_t addr,
 extern unsigned char _irq_to_interrupt_vector[];
 
 #define Z_IRQ_TO_INTERRUPT_VECTOR(irq) \
-	((unsigned int) _irq_to_interrupt_vector[irq])
+	((unsigned int) _irq_to_interrupt_vector[(irq)])
 
 
 #endif /* _ASMLANGUAGE */