diff --git a/inc/gpio.hpp b/inc/gpio.hpp
index 6f0a67b..6a63056 100644
--- a/inc/gpio.hpp
+++ b/inc/gpio.hpp
@@ -21,6 +21,12 @@
 #include <string>
 #include <vector>
 
+enum class GpioState
+{
+    low,
+    high
+};
+
 // this struct has the gpio config for single gpio
 struct gpioInfo
 {