diff --git a/Makefile b/Makefile
index 7a93e30..996b372 100644
--- a/Makefile
+++ b/Makefile
@@ -143,5 +143,5 @@
 
 $(TARGET_DIR)/dnb.index: $(foreach year,$(YEARS),$(TARGET_DIR)/dnb$(year).krill.tar)
 	rm -rf $@
-	java -jar lib/Krill-Indexer.jar -c lib/krill.conf -i $(subst " ",;,$^) -o $@
+	java -jar lib/Krill-Indexer.jar --progress -c lib/krill.conf -i $(subst " ",;,$^) -o $@