Index: /trunk/src/VBox/HostServices/SharedOpenGL/Makefile.kmk
===================================================================
--- /trunk/src/VBox/HostServices/SharedOpenGL/Makefile.kmk	(revision 78411)
+++ /trunk/src/VBox/HostServices/SharedOpenGL/Makefile.kmk	(revision 78412)
@@ -339,5 +339,5 @@
    if1of ($(KBUILD_TARGET), solaris linux freebsd)
     # must come after VBoxOGL2D, therefore don't set the arch-specific LIBS variable here!
-    VBoxTestOGL_LIBS += GL
+    VBoxTestOGL_LIBS += GL pthread
    endif
   endif