diff --git a/Makefile.am b/Makefile.am
index 347bb21..cbb04db 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,7 +19,11 @@ lib_LTLIBRARIES = libxdl_view.la libxdl_viewextra.la
 ## The initial value of this was a mistake!
 ## See the libtool doc.
 libxdl_view_la_LDFLAGS = -version-info 2:0:0
+libxdl_view_la_LIBADD = -lX11 -lXt -lm
+
 libxdl_viewextra_la_LDFLAGS = -version-info 0:0:0
+libxdl_viewextra_la_DEPENDENCIES = libxdl_view.la
+libxdl_viewextra_la_LIBADD = -lm -lxdl_view
 
 EXTRA_DIST = doc/xdl_view_icon.gif doc/xdl_view_top.gif			 \
   doc/xdl_view_top.html doc/xdl_view_updates.html			 \