diff --git a/Makefile.am b/Makefile.am
index 1c36d7d84f..5635269ead 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -87,6 +87,7 @@ CRUFT_DIRS = \
 	$(top_srcdir)/tests/examples/switch \
 	$(top_srcdir)/tests/examples/jack \
 	$(top_srcdir)/ext/alsaspdif \
+	$(top_srcdir)/ext/amrwbenc \
 	$(top_srcdir)/ext/ivorbis \
 	$(top_srcdir)/ext/jack \
 	$(top_srcdir)/ext/metadata \