--- a/old-configure.in
+++ b/old-configure.in
@@ -1481,39 +1481,41 @@ XLIBS="$X_EXTRA_LIBS"
 
 dnl ========================================================
 dnl Checks for X libraries.
 dnl Ordering is important.
 dnl Xt is dependent upon SM as of X11R6
 dnl ========================================================
 if test -n "$MOZ_X11"; then
     AC_DEFINE_UNQUOTED(FUNCPROTO,15)
-    XLIBS="-lX11-xcb -lX11 -lxcb-shm -lxcb $XLIBS"
     _SAVE_LDFLAGS="$LDFLAGS"
     _SAVE_LIBS="$LIBS"
     LDFLAGS="$XLDFLAGS $LDFLAGS"
-    AC_CHECK_LIB(X11, XDrawLines, [X11_LIBS="-lX11"],
+    AC_CHECK_LIB(X11, XDrawLines, [XLIBS="-lX11 $XLIBS"],
         [MISSING_X="$MISSING_X -lX11"], $XLIBS)
     AC_CHECK_LIB(Xext, XextAddDisplay, [XEXT_LIBS="-lXext"],
         [MISSING_X="$MISSING_X -lXext"], $XLIBS)
 
     AC_CHECK_LIB(Xt, XtFree, [ XT_LIBS="-lXt"], [
         unset ac_cv_lib_Xt_XtFree
         AC_CHECK_LIB(ICE, IceFlush, [XT_LIBS="-lICE $XT_LIBS"],, $XT_LIBS $XLIBS)
         AC_CHECK_LIB(SM, SmcCloseConnection, [XT_LIBS="-lSM $XT_LIBS"],, $XT_LIBS $XLIBS)
         AC_CHECK_LIB(Xt, XtFree, [ XT_LIBS="-lXt $XT_LIBS"],
             [MISSING_X="$MISSING_X -lXt"], $X_PRE_LIBS $XT_LIBS $XLIBS)
         ])
 
     dnl ========================================================
     dnl = Check for xcb
     dnl ========================================================
-    AC_CHECK_LIB(X11-xcb, XGetXCBConnection,, [MISSING_X="$MISSING_X -lX11-xcb"], $XLIBS)
-    AC_CHECK_LIB(xcb-shm, xcb_shm_query_version,, [MISSING_X="$MISSING_X -lxcb-shm"], $XLIBS)
-    AC_CHECK_LIB(xcb, xcb_connect,, [MISSING_X="$MISSING_X -lxcb"], $XLIBS)
+    AC_CHECK_LIB(xcb, xcb_connect, [XLIBS="-lxcb $XLIBS"],
+        [MISSING_X="$MISSING_X -lxcb"], $XLIBS)
+    AC_CHECK_LIB(xcb-shm, xcb_shm_query_version, [XLIBS="-lxcb-shm $XLIBS"],
+        [MISSING_X="$MISSING_X -lxcb-shm"], $XLIBS)
+    AC_CHECK_LIB(X11-xcb, XGetXCBConnection, [XLIBS="-lX11-xcb $XLIBS"],
+        [MISSING_X="$MISSING_X -lX11-xcb"], $XLIBS)
 
     dnl ========================================================
     dnl = Check for Xss
     dnl ========================================================
     MOZ_CHECK_HEADER(X11/extensions/scrnsaver.h,
         AC_CHECK_LIB(Xss, XScreenSaverQueryInfo,
             [XSS_LIBS="-lXss $XEXT_LIBS $XLIBS"
              AC_DEFINE(HAVE_LIBXSS)],, $XEXT_LIBS $XLIBS))