diff --git a/libraries/liblunicode/Makefile.in b/libraries/liblunicode/Makefile.in
index c9b8e11e4f..a5030f131d 100644
--- a/libraries/liblunicode/Makefile.in
+++ b/libraries/liblunicode/Makefile.in
@@ -21,7 +21,7 @@ LDAP_LIBDIR= ../../libraries
 
 ucgendat: $(LIBRARY) ucgendat.o
 	$(LTLINK) -o $@ ucgendat.o $(LIBS)
-	./ucgendat $(srcdir)/UnicodeData.txt
+	./ucgendat $(srcdir)/UnicodeData.txt -x $(srcdir)/CompositionExclusions.txt
 
 DATFILES = case.dat cmbcl.dat ctype.dat decomp.dat num.dat