diff --git a/include/FLAC/Makefile.am b/include/FLAC/Makefile.am
index 8226909d..be758771 100644
--- a/include/FLAC/Makefile.am
+++ b/include/FLAC/Makefile.am
@@ -33,6 +33,7 @@ flaccincludedir = $(includedir)/FLAC
 flaccinclude_HEADERS = \
 	all.h \
 	assert.h \
+	callback.h \
 	export.h \
 	file_decoder.h \
 	file_encoder.h \