diff --git a/configure.in b/configure.in
index 20ae00f262..adac18b1eb 100644
--- a/configure.in
+++ b/configure.in
@@ -123,9 +123,9 @@ case "$host" in
     ;;
 esac
 
-#  Enable debugging
+#  Enable 64 bit build
 AC_ARG_ENABLE(64,
-[AC_HELP_STRING([--enable-64],[build with 64 bit support])],[enable_64="$enable_64"],[enable_64="yes"])
+[AC_HELP_STRING([--enable-64],[build with 64 bit support])],[enable_64="$enable_64"],[enable_64="no"])
 
 # tweak compiler specific flags
 if test "x${ax_cv_c_compiler_vendor}"  =  "xsun" ; then