Fix distcheck error
diff --git a/src/Makefile.am b/src/Makefile.am
index bd5ac1f..e5c1942 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -202,7 +202,12 @@
 	@touch $@
 
 CLEANFILES = $(ALIAS_FILES) fontconfig.def
-DISTCLEANFILES = stamp-fcstdint fcstdint.h stamp-fcobjshash.gperf
+DISTCLEANFILES = 	\
+	stamp-fcstdint	\
+	fcstdint.h	\
+	stamp-fcobjshash.gperf	\
+	fcobjshash.h	\
+	fcobjshash.gperf
 
 fontconfig.def: $(PUBLIC_FILES) $(PUBLIC_FT_FILES)
 	echo Generating $@