diff --git a/Makefile.am b/Makefile.am
index d8adb336..895cd4d9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -23,7 +23,7 @@ $(LANG1).autogen.bin: $(BASENAME).$(LANG1).dix
 
 $(LANG1).automorf.bin: $(BASENAME).$(LANG1).dix
 	apertium-validate-dictionary $<
-	./test-scandivoc
+	test ! -f ./test-scandivoc || ./test-scandivoc
 	lt-comp lr $< $@
 
 $(LANG1).autogen.att.gz: $(LANG1).autogen.bin