diff --git a/Makefile.am b/Makefile.am
index 6c4be7490..7c018f4c3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,7 +11,7 @@ EXTRA_DIST = FAQ autogen.sh Stuarts_Poly_Notes  \
 		xgraph/aclocal.m4 \
 		compile_min.sh
 
-MAINTAINERCLEANFILES = Makefile.in aclocal.m4 compile config.guess \
+MAINTAINERCLEANFILES = Makefile.in aclocal.m4 ar-lib compile config.guess \
 			src/include/ngspice/config.h.in config.sub configure install-sh \
 			missing mkinstalldirs stamp-h.in ltconfig \
 			ltmain.sh depcomp ylwrap