diff --git a/arch/arm/core/swap_helper.S b/arch/arm/core/swap_helper.S
index 8ec52a4b813..52549a710e5 100644
--- a/arch/arm/core/swap_helper.S
+++ b/arch/arm/core/swap_helper.S
@@ -451,7 +451,7 @@ _do_syscall:
     ldr r1, =z_arm_do_syscall
     str r1, [r0, #24]   /* overwrite the PC to point to z_arm_do_syscall */
 
-    /* validate syscall limit, only set priv mode if valid */
+    /* validate syscall limit */
     ldr ip, =K_SYSCALL_LIMIT
     cmp r6, ip
     blt valid_syscall_id
@@ -460,6 +460,8 @@ _do_syscall:
     str r6, [r0, #0]
     ldr r6, =K_SYSCALL_BAD
 
+    /* Bad syscalls treated as valid syscalls with ID K_SYSCALL_BAD. */
+
 valid_syscall_id:
     push {r0, r1}
     ldr r0, =_kernel