diff --git a/arch/arm/core/cortex_m/swap.c b/arch/arm/core/cortex_m/swap.c
index b60f6acd675..027fb47a01f 100644
--- a/arch/arm/core/cortex_m/swap.c
+++ b/arch/arm/core/cortex_m/swap.c
@@ -96,11 +96,15 @@ uintptr_t z_arm_pendsv_c(uintptr_t exc_ret)
 
 	/* restore mode */
 	IF_ENABLED(CONFIG_USERSPACE, ({
-			   CONTROL_Type ctrl = {.w = __get_CONTROL()};
-			   /* exit privileged state when returing to thread mode. */
-			   ctrl.b.nPRIV = 0;
-			   __set_CONTROL(ctrl.w | current->arch.mode);
-		   }));
+			CONTROL_Type ctrl = {.w = __get_CONTROL()};
+			/* exit privileged state when returning to thread mode. */
+			ctrl.b.nPRIV = 0;
+			/* __set_CONTROL inserts an ISB which is may not be necessary here
+			 * (stack pointer may not be touched), but it's recommended to avoid
+			 * executing pre-fetched instructions with the previous privilege.
+			 */
+			__set_CONTROL(ctrl.w | current->arch.mode);
+		}));
 
 	return exc_ret;
 }