diff --git a/exercises/04/vslc/vsl_programs/Makefile b/exercises/04/vslc/vsl_programs/Makefile
index 6a38848..a64003b 100644
--- a/exercises/04/vslc/vsl_programs/Makefile
+++ b/exercises/04/vslc/vsl_programs/Makefile
@@ -10,7 +10,7 @@ ps3: $(PS3_EXAMPLES)
 ps4: $(PS4_EXAMPLES)
 
 %.ast: %.vsl clean
-	$(VSLC) -t -T -s < $^ > $@
+	$(VSLC) -T -s < $^ > $@
 
 clean:
 	-rm -r */*.ast