diff --git a/src/runtime/c/gu/seq.c b/src/runtime/c/gu/seq.c
index d994d5990..321d70c5e 100644
--- a/src/runtime/c/gu/seq.c
+++ b/src/runtime/c/gu/seq.c
@@ -150,6 +150,12 @@ gu_buf_trim(GuBuf* buf)
 	return gu_buf_trim_n(buf, 1);
 }
 
+void
+gu_buf_flush(GuBuf* buf)
+{
+	gu_buf_set_length(buf, 0);
+}
+
 void
 gu_buf_pop_n(GuBuf* buf, size_t n_elems, void* data_out)
 {
diff --git a/src/runtime/c/gu/seq.h b/src/runtime/c/gu/seq.h
index 52b2bfc7e..b79f6e8bf 100644
--- a/src/runtime/c/gu/seq.h
+++ b/src/runtime/c/gu/seq.h
@@ -121,6 +121,9 @@ gu_buf_trim_n(GuBuf* buf, size_t n_elems);
 const void*
 gu_buf_trim(GuBuf* buf);
 
+void
+gu_buf_flush(GuBuf* buf);
+
 #define gu_buf_pop(BUF, T)			\
 	(*(T*)gu_buf_trim(BUF))