diff --git a/config/programs.m4 b/config/programs.m4
index 0f836f53520c03b8c86d20c9ab72ca06cd047e86..aca56bb3c9b06411e8f25ea3775855a958d77faf 100644
--- a/config/programs.m4
+++ b/config/programs.m4
@@ -1,4 +1,4 @@
-# $PostgreSQL: pgsql/config/programs.m4,v 1.15 2004/09/02 15:39:55 tgl Exp $
+# $PostgreSQL: pgsql/config/programs.m4,v 1.16 2004/09/02 20:39:57 tgl Exp $
 
 
 # PGAC_PATH_FLEX
@@ -38,7 +38,7 @@ else
       fi
     done
   done
-  rm -f conftest.l
+  rm -f conftest.l lex.yy.c
   : ${pgac_cv_path_flex=no}
 fi
 ])[]dnl AC_CACHE_CHECK
diff --git a/configure b/configure
index 66f14332fb3d04dd39e56aee5e1670061bab79da..9b0dc313434974cf53e6b0eacc25dd65d965229f 100755
--- a/configure
+++ b/configure
@@ -3572,7 +3572,7 @@ else
       fi
     done
   done
-  rm -f conftest.l
+  rm -f conftest.l lex.yy.c
   : ${pgac_cv_path_flex=no}
 fi