diff --git a/configure.ac b/configure.ac
index 6917921be..dda1f4c6b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,7 +57,9 @@ HAVE_X11=0
 test "x$no_x" != "xyes" && HAVE_X11=1
 AC_SUBST(HAVE_X11)
 AM_CONDITIONAL(HAVE_X11, test "x$no_x" != "xyes")
-AC_DEFINE([HAVE_X11], [], [Have X11])
+if test "x$no_x" != "xyes" ; then
+   AC_DEFINE([HAVE_X11], 1, [Have X11])
+fi
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST