diff --git a/plat/intel/soc/common/drivers/qspi/cadence_qspi.h b/plat/intel/soc/common/drivers/qspi/cadence_qspi.h
index 4fb2922..cfef585 100644
--- a/plat/intel/soc/common/drivers/qspi/cadence_qspi.h
+++ b/plat/intel/soc/common/drivers/qspi/cadence_qspi.h
@@ -34,7 +34,7 @@
 #define CAD_QSPI_CFG_CS(x)			(((x) << 11))
 #define CAD_QSPI_CFG_ENABLE			(1 << 0)
 #define CAD_QSPI_CFG_ENDMA_CLR_MSK		0xffff7fff
-#define CAD_QSPI_CFG_IDLE			(1 << 31)
+#define CAD_QSPI_CFG_IDLE			(1U << 31)
 #define CAD_QSPI_CFG_SELCLKPHASE_CLR_MSK	0xfffffffb
 #define CAD_QSPI_CFG_SELCLKPOL_CLR_MSK		0xfffffffd