diff --git a/libmapper/mapper.h b/libmapper/mapper.h
index 9f85c5f..7459e15 100644
--- a/libmapper/mapper.h
+++ b/libmapper/mapper.h
@@ -1,4 +1,3 @@
-#include <stdbool.h>
 #include <systemd/sd-bus.h>
 #include <systemd/sd-event.h>
 
@@ -9,8 +8,7 @@
 void mapper_wait_async_free(mapper_async_wait *);
 
 int mapper_wait_async(sd_bus *, sd_event *, char *[],
-		void (*)(int, void *), void *, mapper_async_wait **,
-		bool);
+		void (*)(int, void *), void *, mapper_async_wait **);
 int mapper_get_service(sd_bus *conn, const char *obj, char **service);
 int mapper_get_object(sd_bus *conn, const char *obj, sd_bus_message **reply);
 #ifdef __cplusplus