diff --git a/src/version.h b/src/version.h
index a459506a..f106a903 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,10 +1,35 @@
+#pragma once
+
+#include <stdint.h>
+
 #define CLASS 1
 
+#ifndef MAJOR_VERSION
+#define MAJOR_VERSION 0
+#endif
+
+#ifndef MINOR_VERSION
+#define MINOR_VERSION 0
+#endif
+
+#ifndef PATCH_VERSION
+#define PATCH_VERSION 0
+#endif
+
+/**
+ * @brief This structure represents the version
+ *
+ */
 typedef struct version {
-    uint8_t class;
+    uint8_t class;  /// 0 for the wallet app
+                    /// 1 for the baking app
     uint8_t major;
     uint8_t minor;
     uint8_t patch;
 } version_t;
 
+/**
+ * @brief Constant app version
+ *
+ */
 const version_t version = {CLASS, MAJOR_VERSION, MINOR_VERSION, PATCH_VERSION};