diff --git a/pjmedia/include/pjmedia-codec/config.h b/pjmedia/include/pjmedia-codec/config.h
index 40376d1..3fa8189 100644
--- a/pjmedia/include/pjmedia-codec/config.h
+++ b/pjmedia/include/pjmedia-codec/config.h
@@ -203,4 +203,24 @@
 #   define PJMEDIA_HAS_PASSTHROUGH_CODECS	0
 #endif
 
+#ifndef PJMEDIA_HAS_PASSTHROUGH_CODEC_AMR
+#   define PJMEDIA_HAS_PASSTHROUGH_CODEC_AMR	1
+#endif
+
+#ifndef PJMEDIA_HAS_PASSTHROUGH_CODEC_G729
+#   define PJMEDIA_HAS_PASSTHROUGH_CODEC_G729	1
+#endif
+
+#ifndef PJMEDIA_HAS_PASSTHROUGH_CODEC_ILBC
+#   define PJMEDIA_HAS_PASSTHROUGH_CODEC_ILBC	1
+#endif
+
+#ifndef PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMU
+#   define PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMU	1
+#endif
+
+#ifndef PJMEDIA_HAS_PASSTHROUGH_CODEC_G729
+#   define PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMA	1
+#endif
+
 #endif	/* __PJMEDIA_CODEC_CONFIG_H__ */