https://github.com/pocoproject/poco/issues/131

--- Foundation/src/Timezone_UNIX.cpp.orig	Wed Mar  6 19:45:52 2013
+++ Foundation/src/Timezone_UNIX.cpp	Tue Mar 19 17:13:08 2013
@@ -52,7 +52,7 @@ class TZInfo (public)
 	
 	int timeZone()
 	{
-	#if defined(__APPLE__)  || defined(__FreeBSD__) || defined(POCO_ANDROID) // no timezone global var
+	#if defined(__APPLE__) || defined(__FreeBSD__) || defined (__OpenBSD__) || defined(POCO_ANDROID) // no timezone global var
 		std::time_t now = std::time(NULL);
 		struct std::tm t;
 		gmtime_r(&now, &t);