--- conky.h	2020-02-07 17:05:54.464384995 +0200
+++ conky.h.new	2020-02-07 17:06:08.524159777 +0200
@@ -35,6 +35,7 @@
 #include "common.h"	/* at least for struct dns_data */
 #include <sys/utsname.h> /* struct uname_s */
 #include <arpa/inet.h>
+#include <stdbool.h>
 
 #if defined(HAS_MCHECK_H)
 #include <mcheck.h>