diff --git a/configure.in b/configure.in
index 6d38a0fcce7..c6552a95e06 100644
--- a/configure.in
+++ b/configure.in
@@ -154,7 +154,7 @@ PHP_PROG_LEX
 dnl Check if bison generated files exist when bison does not..
 case $php_cv_bison_version in
   ""|invalid[)]
-    if ! test -f "$abs_srcdir/Zend/zend_language_parser.h" || ! test -f "$abs_srcdir/Zend/zend_language_parser.c" ; then
+    if ! test -f "$abs_srcdir/Zend/zend_language_parser.h" || ! test -f "$abs_srcdir/Zend/zend_language_parser.c" ; then
       AC_MSG_ERROR([bison is required to build PHP/Zend when building a CVS checkout!])
     fi
     ;;