--- a/configure
+++ b/configure
@@ -15048,7 +15048,7 @@
 
 # Check whether --enable-vlock was given.
 if test "${enable_vlock+set}" = set; then :
-  enableval=$enable_vlock; VLOCK_PROG=no
+  enableval=$enable_vlock; VLOCK_PROG=$enableval
 else
   VLOCK_PROG=yes
 fi
--- a/configure.ac
+++ b/configure.ac
@@ -111,7 +111,7 @@
 
 AC_ARG_ENABLE(vlock,
 	AS_HELP_STRING(--disable-vlock, [do not build vlock]),
-	[VLOCK_PROG=no],[VLOCK_PROG=yes])
+	[VLOCK_PROG=$enableval],[VLOCK_PROG=yes])
 AM_CONDITIONAL(VLOCK, test "$VLOCK_PROG" = "yes")
 
 if test "$VLOCK_PROG" = "yes"; then