diff --git a/Makefile b/Makefile
index f1928f9..9b1195d 100644
--- a/Makefile
+++ b/Makefile
@@ -5,12 +5,13 @@ lib.name = comport
 class.sources = comport.c
 
 datafiles = \
-        comport-help.pd \
+	comport-help.pd \
 	comport-meta.pd \
-        comport-stress-test.pd \
-        CHANGES.txt \
+	comport-stress-test.pd \
+	CHANGES.txt \
 	LICENSE.txt \
-	README.txt
+	README.txt \
+	$(empty)
 
 # This Makefile is based on the Makefile from pd-lib-builder written by
 # Katja Vetter. You can get it from: