diff --git a/quicly/streambuf.nim b/quicly/streambuf.nim
index fd09b63..9573e8d 100644
--- a/quicly/streambuf.nim
+++ b/quicly/streambuf.nim
@@ -52,7 +52,7 @@ proc quicly_streambuf_ingress_receive*(stream: ptr quicly_stream_t,
                                       {.cdecl, importc.}
 
 proc quicly_streambuf_ingress_get*(stream: ptr quicly_stream_t): ptls_iovec_t
-                                  {.cdecl, importc, header: "quicly/streambuf.h".}
+                                  {.cdecl, importc.}
 
 proc quicly_streambuf_ingress_shift*(stream: ptr quicly_stream_t,
                                      delta: csize_t)