Index: src/slic3r/GUI/InstanceCheck.cpp
--- src/slic3r/GUI/InstanceCheck.cpp.orig
+++ src/slic3r/GUI/InstanceCheck.cpp
@@ -31,7 +31,7 @@
 #include <strsafe.h>
 #endif //WIN32
 
-#if __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
 #include <dbus/dbus.h> /* Pull in all of D-Bus headers. */
 #endif //__linux__
 
@@ -316,7 +316,7 @@ namespace instance_check_internal
 		return false;
 	}
 
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__OpenBSD__)
 
 	static void list_matching_objects(const std::string& pattern, std::vector<std::string>& result) 
 	{
