diff --git a/configure b/configure
index 54ae59068b2fc65cfde2e903d2880f65943d3da7..b6c54338c1e19ef90480e1c1051bf1c400f035b2 100755
--- a/configure
+++ b/configure
@@ -4426,14 +4426,13 @@ done
 
 
 if test "$YACC"; then
-  if "$YACC" --version | sed q | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'; then
+  if $YACC --version | sed q | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'; then
     { echo "$as_me:$LINENO: WARNING:
 *** The installed version of Bison is too old.  PostgreSQL needs
 *** Bison version 1.875 or later." >&5
 echo "$as_me: WARNING:
 *** The installed version of Bison is too old.  PostgreSQL needs
 *** Bison version 1.875 or later." >&2;}
-    unset YACC
   fi
 fi
 
diff --git a/configure.in b/configure.in
index f5cba505c551610c811ffe8ae075347366114a1a..f70d3d2f723367c4638602db01ad98cfc7cb8a00 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-dnl $Header: /cvsroot/pgsql/configure.in,v 1.256 2003/06/07 16:32:05 momjian Exp $
+dnl $Header: /cvsroot/pgsql/configure.in,v 1.257 2003/06/09 03:41:46 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -587,11 +587,10 @@ PGAC_CHECK_STRIP
 AC_CHECK_PROGS(YACC, ['bison -y'])
 
 if test "$YACC"; then
-  if "$YACC" --version | sed q | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'; then
+  if $YACC --version | sed q | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'; then
     AC_MSG_WARN([
 *** The installed version of Bison is too old.  PostgreSQL needs
 *** Bison version 1.875 or later.])
-    unset YACC
   fi
 fi