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-rw-r--r--src/tools/msvc/pgbison.pl2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tools/msvc/pgbison.pl b/src/tools/msvc/pgbison.pl
index 31e75403f59..086a07ddf66 100644
--- a/src/tools/msvc/pgbison.pl
+++ b/src/tools/msvc/pgbison.pl
@@ -7,7 +7,7 @@ use File::Basename;
# assume we are in the postgres source root
-require 'src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
+do 'src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
my ($bisonver) = `bison -V`; # grab first line
$bisonver = (split(/\s+/, $bisonver))[3]; # grab version number