Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -120,7 +120,7 @@ else ()
 endif ()
 
 # System specific actions
-if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Linux|FreeBSD|Darwin)")
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Linux|FreeBSD|Darwin|OpenBSD)")
     if (NOT DATA_PREFIX)
         set(DATA_PREFIX ${CMAKE_INSTALL_PREFIX}/share/cataclysm-dda)
     endif ()
