diff --git a/upb/pb/encoder.c b/upb/pb/encoder.c
index b8e9191fc0..3734710059 100644
--- a/upb/pb/encoder.c
+++ b/upb/pb/encoder.c
@@ -374,8 +374,7 @@ static void *encode_startdelimfield(void *c, const void *hd) {
   return ok ? c : UPB_BREAK;
 }
 
-static bool encode_unknown(void *c, const void *hd, const char *buf,
-                           size_t len) {
+bool encode_unknown(void *c, const void *hd, const char *buf, size_t len) {
   UPB_UNUSED(hd);
   return encode_bytes(c, buf, len) && commit(c);
 }
@@ -571,9 +570,3 @@ upb_pb_encoder *upb_pb_encoder_create(upb_env *env, const upb_handlers *h,
 }
 
 upb_sink *upb_pb_encoder_input(upb_pb_encoder *e) { return &e->input_; }
-
-void upb_pb_encoder_encode_unknown(upb_pb_encoder *p, const char *buf,
-                                   size_t size) {
-  encode_bytes(p, buf, size);
-  commit(p);
-}
diff --git a/upb/pb/encoder.h b/upb/pb/encoder.h
index 3d8dce1ceb..780dfcb11b 100644
--- a/upb/pb/encoder.h
+++ b/upb/pb/encoder.h
@@ -64,8 +64,8 @@ const upb_handlers *upb_pb_encoder_newhandlers(const upb_msgdef *m,
 upb_sink *upb_pb_encoder_input(upb_pb_encoder *p);
 upb_pb_encoder* upb_pb_encoder_create(upb_env* e, const upb_handlers* h,
                                       upb_bytessink* output);
-void upb_pb_encoder_encode_unknown(upb_pb_encoder* p, const char* buf,
-                                   size_t size);
+bool encode_unknown(upb_pb_encoder* p, const void* hd, const char* buf,
+                    size_t size);
 
 UPB_END_EXTERN_C