1 files changed, 2 insertions, 0 deletions
diff --git a/makefile b/makefile
index d3324ff..afeac1c 100644
--- a/makefile
+++ b/makefile
@@ -32,3 +32,5 @@ clean:
 	@echo " rm -r $(LEXBUILDDIR) $(LEXTARGETDIR) $(LEXSRCDIR)/$(LEXTARGET).yy.cpp"; rm -r $(LEXBUILDDIR) bin $(LEXSRCDIR)/c_lexer.yy.cpp
 
 .PHONY: clean
+
+.PRECIOUS: $(LEXSRCDIR)/%.yy.cpp