diff --git a/src/expenses/types.h b/src/expenses/types.h
index 68b04ab..fb95e4e 100644
--- a/src/expenses/types.h
+++ b/src/expenses/types.h
@@ -1,6 +1,7 @@
 /* additional types for expenses grammar
  */
 #pragma once
+#include <stdbool.h>
 #include <unistd.h>
 
 typedef enum BotCommand {