diff --git a/include/share/private.h b/include/share/private.h
index c22e4d4b..4cae73f5 100644
--- a/include/share/private.h
+++ b/include/share/private.h
@@ -36,10 +36,10 @@
  * Unpublished debug routines from libFLAC> This should not be used from any
  * client code other than code shipped with the FLAC sources.
  */
-FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
-FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
-FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
-FLAC__bool FLAC__stream_encoder_set_do_md5(FLAC__StreamEncoder *encoder, FLAC__bool value);
-FLAC__bool FLAC__stream_encoder_get_do_md5(const FLAC__StreamEncoder *encoder);
+FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
+FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
+FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
+FLAC_API FLAC__bool FLAC__stream_encoder_set_do_md5(FLAC__StreamEncoder *encoder, FLAC__bool value);
+FLAC_API FLAC__bool FLAC__stream_encoder_get_do_md5(const FLAC__StreamEncoder *encoder);
 
 #endif /* FLAC__SHARE__PRIVATE_H */