diff --git a/configure.ac b/configure.ac
index ba52329c4..8395049fc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -735,11 +735,13 @@ REQUIRED_LIBS="xfont xau [pixman-1 >= 0.15.20]"
 
 dnl List of libraries that require a specific version
 LIBAPPLEWM="applewm >= 1.4"
+LIBDMX="dmx >= 1.0.99.1"
 LIBDRI="dri >= 7.1.0"
 LIBDRM="libdrm >= 2.3.0"
 LIBGL="gl >= 7.1.0"
 LIBXEXT="xext >= 1.0.99.4"
 LIBXI="xi >= 1.2.99.1"
+LIBXTST="xtst >= 1.0.99.2"
 LIBPCIACCESS="pciaccess >= 0.8.0"
 LIBGLIB="glib-2.0 >= 2.16"
 
@@ -1820,13 +1822,13 @@ dnl Linux sources in DMX require <linux/keyboard.h>
 	PKG_CHECK_MODULES([XDMXCONFIG_DEP], [xaw7 xmu xt xpm x11])
 	AC_SUBST(XDMXCONFIG_DEP_CFLAGS)
 	AC_SUBST(XDMXCONFIG_DEP_LIBS)
-	PKG_CHECK_MODULES([DMXEXAMPLES_DEP], [dmx $LIBXEXT x11])
+	PKG_CHECK_MODULES([DMXEXAMPLES_DEP], [$LIBDMX $LIBXEXT x11])
 	AC_SUBST(DMXEXAMPLES_DEP_LIBS)
-	PKG_CHECK_MODULES([DMXXMUEXAMPLES_DEP], [dmx xmu $LIBXEXT x11])
+	PKG_CHECK_MODULES([DMXXMUEXAMPLES_DEP], [$LIBDMX xmu $LIBXEXT x11])
 	AC_SUBST(DMXXMUEXAMPLES_DEP_LIBS)
-	PKG_CHECK_MODULES([DMXXIEXAMPLES_DEP], [dmx $LIBXI $LIBXEXT x11])
+	PKG_CHECK_MODULES([DMXXIEXAMPLES_DEP], [$LIBDMX $LIBXI $LIBXEXT x11])
 	AC_SUBST(DMXXIEXAMPLES_DEP_LIBS)
-	PKG_CHECK_MODULES([XTSTEXAMPLES_DEP], [xtst $LIBXEXT x11])
+	PKG_CHECK_MODULES([XTSTEXAMPLES_DEP], [$LIBXTST $LIBXEXT x11])
 	AC_SUBST(XTSTEXAMPLES_DEP_LIBS)
 	PKG_CHECK_MODULES([XRESEXAMPLES_DEP], [xres $LIBXEXT x11])
 	AC_SUBST(XRESEXAMPLES_DEP_LIBS)