diff --git a/lispref/Makefile.in b/lispref/Makefile.in
index 8f5ccb57e15..79be5fc39af 100644
--- a/lispref/Makefile.in
+++ b/lispref/Makefile.in
@@ -115,7 +115,6 @@ clean:
 	rm -f *.toc *.aux *.log *.cp *.cps *.fn *.fns *.tp *.tps \
               *.vr *.vrs *.pg *.pgs *.ky *.kys
 	rm -f make.out core
-	rm -f index.texi
 
 distclean: clean