Index: src/slic3r/CMakeLists.txt
--- src/slic3r/CMakeLists.txt.orig
+++ src/slic3r/CMakeLists.txt
@@ -408,8 +408,8 @@ target_link_libraries(libslic3r_gui libslic3r avrdude 
 
 if (MSVC)
     target_link_libraries(libslic3r_gui Setupapi.lib)
-elseif (CMAKE_SYSTEM_NAME STREQUAL "Linux")
-    target_link_libraries(libslic3r_gui ${DBUS_LIBRARIES}) 
+elseif (CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
+    target_link_libraries(libslic3r_gui ${DBUS_LIBRARIES} ssl crypto)
 elseif (APPLE)
     target_link_libraries(libslic3r_gui ${DISKARBITRATION_LIBRARY} ${COREWLAN_LIBRARY})
 endif()
