diff --git a/soc/nxp/imx/imx9/imx943/pm_mcore.c b/soc/nxp/imx/imx9/imx943/pm_mcore.c
index fa8ccda151921..c39f69e57a43c 100644
--- a/soc/nxp/imx/imx9/imx943/pm_mcore.c
+++ b/soc/nxp/imx/imx9/imx943/pm_mcore.c
@@ -37,7 +37,9 @@ static void pm_state_before(void)
 
 	/* IRQs enabled at NVIC level become GPC wake sources */
 	for (uint32_t idx = 0; idx < nvic_iser_nb; idx++) {
-		wake_mask[idx] = ~(NVIC->ISER[idx]);
+		if (idx < GPC_CPU_CTRL_CMC_IRQ_WAKEUP_MASK_COUNT) {
+			wake_mask[idx] = ~(NVIC->ISER[idx]);
+		}
 	}
 
 	cpu_irq_mask_cfg.cpu_id = cpu_idx;