diff --git a/pl/ostype/NetBSD.pl b/pl/ostype/NetBSD.pl
index 2d81658..de93b14 100644
--- a/pl/ostype/NetBSD.pl
+++ b/pl/ostype/NetBSD.pl
@@ -2,5 +2,6 @@ add_incdir("-I/usr/X11R7/include -I/usr/pkg/include");
 add_libdir(
     "-L/usr/X11R7/lib -Wl,-R/usr/X11R7/lib -L/usr/pkg/lib -Wl,-R/usr/pkg/lib");
 use_backend("x11");
+add_libs("pthread");
 
 1;