diff --git a/wmake/rules/General/flex++ b/wmake/rules/General/flex++
index 6f68d78001..304b131c6d 100644
--- a/wmake/rules/General/flex++
+++ b/wmake/rules/General/flex++
@@ -1,6 +1,6 @@
 .SUFFIXES: .L
 
-Ltoo = flex --c++ -f $$SOURCE ; mv lex.yy.cc $*.C ; $(CC) $(c++FLAGS) -c $*.C -o $@
+Ltoo = flex -+ -f $$SOURCE ; mv lex.yy.cc $*.C ; $(CC) $(c++FLAGS) -c $*.C -o $@
 
 .L.dep:
 	$(MAKE_DEP)