Fix typo
diff --git a/Makefile.am b/Makefile.am
index 9ccdf02..3c1e7a2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,7 +11,7 @@
 	harfbuzz.doap \
 	Android.mk \
 	README.python \
-	BUILD.mk \
+	BUILD.md \
 	$(NULL)
 
 MAINTAINERCLEANFILES = \