diff --git a/b91_devkit/liteos_m/include/target_config.h b/b91_devkit/liteos_m/include/target_config.h
index 4d54e78..72fcfed 100755
--- a/b91_devkit/liteos_m/include/target_config.h
+++ b/b91_devkit/liteos_m/include/target_config.h
@@ -109,6 +109,8 @@ extern "C" {
 #define LOSCFG_POWER_MODE_DCDC_1P4_DCDC_1P8                 1
 #define LOSCFG_VBAT_TYPE_MAX_VALUE_GREATER_THAN_3V6         1
 
+#define LOSCFG_KERNEL_PM 									1
+
 #ifdef __cplusplus
 #if __cplusplus
 }