diff --git a/configure1.in b/configure1.in
index 2d6d8d6686e..5aefb917feb 100755
--- a/configure1.in
+++ b/configure1.in
@@ -1196,6 +1196,12 @@ if [ x"${version}" = x ]; then
   exit 1
 fi
 
+if [ -f /usr/lpp/X11/bin/smt.exp ]; then
+  ]
+  AC_DEFINE(HAVE_AIX_SMT_EXP)
+  [
+fi
+
 
 #### Specify what sort of things we'll be editing into Makefile and config.h.
 ### Use configuration here uncanonicalized to avoid exceeding size limits.