Index: configure
===================================================================
diff -u -r7d1e68dd44eb6cddb6755e335e1070bb7be2e6f8 -rc27616906b8caeb0fac615122f183e506131c38d
--- configure	(.../configure)	(revision 7d1e68dd44eb6cddb6755e335e1070bb7be2e6f8)
+++ configure	(.../configure)	(revision c27616906b8caeb0fac615122f183e506131c38d)
@@ -2380,7 +2380,7 @@
 
 # Check whether --with-dtrace was given.
 if test "${with_dtrace+set}" = set; then :
-  withval=$with_dtrace; with_dtrace=$enableval
+  withval=$with_dtrace; with_dtrace=$withval
 else
   with_dtrace=no
 fi
Index: configure.in
===================================================================
diff -u -r7d1e68dd44eb6cddb6755e335e1070bb7be2e6f8 -rc27616906b8caeb0fac615122f183e506131c38d
--- configure.in	(.../configure.in)	(revision 7d1e68dd44eb6cddb6755e335e1070bb7be2e6f8)
+++ configure.in	(.../configure.in)	(revision c27616906b8caeb0fac615122f183e506131c38d)
@@ -50,7 +50,7 @@
         [with_expat=$withval],[with_expat=bundle])
 AC_ARG_WITH(dtrace,
 	AC_HELP_STRING([--with-dtrace], [build nsf with dtrace (default: without)]),
-        [with_dtrace=$enableval], [with_dtrace=no])
+        [with_dtrace=$withval], [with_dtrace=no])
 AC_ARG_ENABLE(profile,
 	AC_HELP_STRING([--enable-profile], [build nsf with profile support (default: disabled)]),
         [enable_profile=$enableval], [enable_profile=no])