diff --git a/libdmmp/libdmmp_private.h b/libdmmp/libdmmp_private.h
index ac85b63f..b1a6ddea 100644
--- a/libdmmp/libdmmp_private.h
+++ b/libdmmp/libdmmp_private.h
@@ -30,6 +30,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <assert.h>
+#include <stdbool.h>
 #include <json.h>
 
 #include "libdmmp/libdmmp.h"
@@ -82,7 +83,7 @@ static out_type func_name(struct dmmp_context *ctx, const char *var_name) { \
 do { \
 	json_type j_type = json_type_null; \
 	json_object *j_obj_tmp = NULL; \
-	if (json_object_object_get_ex(j_obj, key, &j_obj_tmp) != TRUE) { \
+	if (json_object_object_get_ex(j_obj, key, &j_obj_tmp) != true) { \
 		_error(ctx, "Invalid JSON output from multipathd IPC: " \
 		       "key '%s' not found", key); \
 		rc = DMMP_ERR_IPC_ERROR; \