1 files changed, 4 insertions, 1 deletions
diff --git a/src/sink.c b/src/sink.c
index 1c5c500f..40071d72 100644
--- a/src/sink.c
+++ b/src/sink.c
@@ -18,6 +18,8 @@
 
 #include "statement.h"
 
+#include <stddef.h>
+
 SerdStatus
 serd_sink_write_base(const SerdSink* sink, const SerdNode* uri)
 {
@@ -48,7 +50,8 @@ serd_sink_write(const SerdSink*          sink,
                 const SerdNode*          object,
                 const SerdNode*          graph)
 {
-	const SerdStatement statement = { { subject, predicate, object, graph } };
+	const SerdStatement statement = { { subject, predicate, object, graph },
+		                              NULL };
 	return sink->statement(sink->handle, flags, &statement);
 }