diff --git a/include/util/token.h b/include/util/token.h
index 9e6282d4..3aef69cf 100644
--- a/include/util/token.h
+++ b/include/util/token.h
@@ -3,8 +3,14 @@
 
 #include <stdbool.h>
 
+/**
+ * Number of bytes used by a token, including the terminating zero byte.
+ */
 #define TOKEN_SIZE 33
 
+/**
+ * Generate a random token string.
+ */
 bool generate_token(char out[static TOKEN_SIZE]);
 
 #endif