diff --git a/clisp.spec b/clisp.spec
index ca8e6d9..58845c7 100644
--- a/clisp.spec
+++ b/clisp.spec
@@ -276,7 +276,7 @@ tail -q -s 0.5 -f $SCREENLOG & pid=$!
     --with-module=postgresql
 
 %_make -C build lispbibl.h
-grep TYPECODES build/lispbibl.h
+grep TYPECODES build/lispbibl.h || :
 %_make -C build
 %_make -C build check