diff --git a/src/tools/msvc/gendef.pl b/src/tools/msvc/gendef.pl
index df19771812b..7bd32cbf9a4 100644
--- a/src/tools/msvc/gendef.pl
+++ b/src/tools/msvc/gendef.pl
@@ -2,7 +2,7 @@ my @def;
 #
 # Script that generates a .DEF file for all objects in a directory
 # 
-# $PostgreSQL: pgsql/src/tools/msvc/gendef.pl,v 1.5 2007/03/17 14:01:01 mha Exp $
+# $PostgreSQL: pgsql/src/tools/msvc/gendef.pl,v 1.6 2007/05/03 14:04:03 mha Exp $
 #
 
 die "Usage: gendef.pl <modulepath>\n" unless ($ARGV[0] =~ /\\([^\\]+$)/);
@@ -36,6 +36,7 @@ while (<$ARGV[0]/*.obj>)
         next if $pieces[6] =~ /NULL_THUNK_DATA$/;
         next if $pieces[6] =~ /^__IMPORT_DESCRIPTOR/;
         next if $pieces[6] =~ /^__NULL_IMPORT/;
+        next if $pieces[6] =~ /^\?\?_C/;
 
         push @def, $pieces[6];
     }