diff --git a/configure b/configure
index 81d0751d..3325472b 100755
--- a/configure
+++ b/configure
@@ -5352,7 +5352,7 @@ fi
 if test "${enable_dhcpv6+set}" = set; then :
   enableval=$enable_dhcpv6;
 fi
-,
+
 # DHCPv6 is on by default, so define if it is not explicitly disabled.
 if test "$enable_dhcpv6" != "no"; then
     enable_dhcpv6="yes"
diff --git a/configure.ac b/configure.ac
index ce1ddd5a..5dd966f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,7 +127,7 @@ fi
 
 # DHCPv6 optional compile-time feature.
 AC_ARG_ENABLE(dhcpv6,
-	AS_HELP_STRING([--enable-dhcpv6],[enable support for DHCPv6 (default is yes)])),
+	AS_HELP_STRING([--enable-dhcpv6],[enable support for DHCPv6 (default is yes)]))
 # DHCPv6 is on by default, so define if it is not explicitly disabled.
 if test "$enable_dhcpv6" != "no"; then
     enable_dhcpv6="yes"