diff --git a/src/systemd/sd-json.h b/src/systemd/sd-json.h
index 02c5843f07..3930d82b0d 100644
--- a/src/systemd/sd-json.h
+++ b/src/systemd/sd-json.h
@@ -20,7 +20,6 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stddef.h>
 #include <stdio.h>
 
@@ -343,7 +342,7 @@ int sd_json_variant_unhex(sd_json_variant *v, void **ret, size_t *ret_size);
 const char* sd_json_variant_type_to_string(sd_json_variant_type_t t);
 sd_json_variant_type_t sd_json_variant_type_from_string(const char *s);
 
-__extension__ _sd_const_ static __inline__ bool sd_json_format_enabled(sd_json_format_flags_t flags) {
+_sd_const_ static __inline__ int sd_json_format_enabled(sd_json_format_flags_t flags) {
         return !(flags & SD_JSON_FORMAT_OFF);
 }
 
diff --git a/src/systemd/sd-varlink-idl.h b/src/systemd/sd-varlink-idl.h
index e5e8a57498..620cbf50cb 100644
--- a/src/systemd/sd-varlink-idl.h
+++ b/src/systemd/sd-varlink-idl.h
@@ -18,7 +18,6 @@
 ***/
 
 #include <errno.h>
-#include <stdbool.h>
 #include <stdio.h>
 
 #include "sd-json.h"