$OpenBSD$
From upstream de6babb928c074d1cf0d3a6fb264cfb5d70bbd52.
--- Source/Core/VideoCommon/DriverDetails.cpp.orig	Wed Jul 13 22:56:28 2016
+++ Source/Core/VideoCommon/DriverDetails.cpp	Wed Jul 13 22:56:42 2016
@@ -32,6 +32,8 @@ namespace DriverDetails
 	const u32 m_os = OS_ALL | OS_LINUX;
 #elif __FreeBSD__
 	const u32 m_os = OS_ALL | OS_FREEBSD;
+#elif __OpenBSD__
+	const u32 m_os = OS_ALL | OS_OPENBSD;
 #endif
 
 	static Vendor m_vendor = VENDOR_UNKNOWN;