diff --git a/Makefile.in b/Makefile.in
index 4333e272d..6972bda98 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -166,6 +166,7 @@ clean:
 	$(foreach dir,$(SUBDIRS),$(MAKE) -C $(dir) $@ && ) true
 	rm -f *.o parse.cc parse.h lexor.cc
 	rm -f ivl.exp iverilog-vpi.man iverilog-vpi.pdf iverilog-vpi.ps
+	rm -f iverilog_man.ps iverilog_man.pdf iverilog_man_`./version.exe %M_%n`.pdf
 	rm -f parse.output syn-rules.output dosify$(BUILDEXT) ivl@EXEEXT@ check.vvp
 	rm -f lexor_keyword.cc libivl.a libvpi.a iverilog-vpi syn-rules.cc
 	rm -rf dep