$OpenBSD$
--- src/build-data/botan.pc.in.orig	Tue Oct 20 01:05:24 2009
+++ src/build-data/botan.pc.in	Tue Oct 20 01:05:31 2009
@@ -7,6 +7,6 @@ Name: Botan
 Description: Multi-platform C++ crypto library
 Version: %{version}
 
-Libs: -L${libdir} -lbotan
+Libs: -L${libdir} -lbotan -pthread
 Libs.private: %{link_to}
 Cflags: -I${includedir}
