diff --git a/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/armparams.h b/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/armparams.h
index 8435a5dc1..0f5f0a847 100755
--- a/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/armparams.h
+++ b/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/armparams.h
@@ -87,6 +87,8 @@
 #define ARM_IRQ_VECTOR_REG      0xF803C010
 
 #endif
+
+#define ARM_ENABLE_WFI_IDLE     TRUE
 #endif /* ARMPARAMS_H */
 
 /** @} */