diff --git a/src/tools/msvc/Mkvcbuild.pm b/src/tools/msvc/Mkvcbuild.pm
index 308a4b4..51385d0 100644
--- a/src/tools/msvc/Mkvcbuild.pm
+++ b/src/tools/msvc/Mkvcbuild.pm
@@ -653,6 +653,7 @@ sub AddContrib
 			$proj->AddFile('contrib\\' . $n . '\\' . $o);
 		}
 		$proj->AddReference($postgres);
+		$proj->AddDir('contrib\\' . $n);
 		if ($mf =~ /^SUBDIRS\s*:?=\s*(.*)$/mg)
 		{
 			foreach my $d (split /\s+/, $1)
@@ -680,6 +681,7 @@ sub AddContrib
 		{
 			my $proj = $solution->AddProject($mod, 'dll', 'contrib');
 			$proj->AddFile('contrib\\' . $n . '\\' . $mod . '.c');
+			$proj->AddDir('contrib\\' . $n);
 			$proj->AddReference($postgres);
 			AdjustContribProj($proj);
 		}
@@ -697,6 +699,7 @@ sub AddContrib
 			$o =~ s/\.o$/.c/;
 			$proj->AddFile('contrib\\' . $n . '\\' . $o);
 		}
+		$proj->AddDir('contrib\\' . $n);
 		AdjustContribProj($proj);
 	}
 	else