diff --git a/include/smomo_config.h b/include/smomo_config.h
index e203102..ff409d6 100644
--- a/include/smomo_config.h
+++ b/include/smomo_config.h
@@ -32,10 +32,16 @@
 #ifndef __SMOMO_CONFIG_H__
 #define __SMOMO_CONFIG_H__
 
+#include <cstdint>
+
 namespace smomoconfig {
 
 int EnableSmomo(bool enable);
 
+int GetSmomoMode(uint32_t *mode_idx);
+
+int SetSmomoMode(uint32_t mode_idx);
+
 }  // namespace smomoconfig
 
 #endif  // __SMOMO_CONFIG_H__