diff --git a/arch/arm/core/swap_helper.S b/arch/arm/core/swap_helper.S
index db57535d5aa..8d1796d4423 100644
--- a/arch/arm/core/swap_helper.S
+++ b/arch/arm/core/swap_helper.S
@@ -216,11 +216,9 @@ _thread_irq_disabled:
 
 #ifdef CONFIG_BUILTIN_STACK_GUARD
     /* clear stack pointer limit before setting the PSP */
-    push {r3}
-    mov r3, #0
-    msr PSPLIM, r3
-    pop {r3}
-#endif
+    mov r0, #0
+    msr PSPLIM, r0
+#endif /* CONFIG_BUILTIN_STACK_GUARD */
 
     msr PSP, ip