diff --git a/lib/tdb/include/tdb.h b/lib/tdb/include/tdb.h
index 5ea5e6048c6..03e429cc8a8 100644
--- a/lib/tdb/include/tdb.h
+++ b/lib/tdb/include/tdb.h
@@ -31,6 +31,7 @@ extern "C" {
 #endif
 
 #include <signal.h>
+#include <stdbool.h>
 
 /**
  * @defgroup tdb The tdb API