diff --git a/ChangeLog b/ChangeLog
index 96dcca3ca..31926b109 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-* 2015-11-??: Version 0.5.1
+* 2015-11-18: Version 0.5.1
   * Bugfix: growing upstreams arrow.
   * Bugfix: Segfault on timeout in specific conditions
   * Bugfix: install getdns_extra.h from build location
diff --git a/configure.ac b/configure.ac
index 61261781b..7422f67c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,7 +36,7 @@ sinclude(./m4/ax_check_compile_flag.m4)
 sinclude(./m4/pkg.m4)
 
 AC_INIT([getdns], [0.5.1], [stub-resolver@verisignlabs.com], [], [https://getdnsapi.net])
-AC_SUBST(RELEASE_CANDIDATE, [rc1])
+AC_SUBST(RELEASE_CANDIDATE, [])
 
 # Set current date from system if not set
 AC_ARG_WITH([current-date],
@@ -46,7 +46,7 @@ AC_ARG_WITH([current-date],
   [CURRENT_DATE="`date -u +%Y-%m-%dT%H:%M:%SZ`"])
 
 AC_SUBST(GETDNS_VERSION, ["AC_PACKAGE_VERSION$RELEASE_CANDIDATE"])
-AC_SUBST(GETDNS_NUMERIC_VERSION, [0x00050001])
+AC_SUBST(GETDNS_NUMERIC_VERSION, [0x00050100])
 AC_SUBST(API_VERSION, ["October 2015"])
 AC_SUBST(API_NUMERIC_VERSION, [0x07df0a00])
 GETDNS_COMPILATION_COMMENT="AC_PACKAGE_NAME $GETDNS_VERSION configured on $CURRENT_DATE for the $API_VERSION version of the API"
@@ -74,7 +74,7 @@ GETDNS_COMPILATION_COMMENT="AC_PACKAGE_NAME $GETDNS_VERSION configured on $CURRE
 # getdns-0.3.2 had libversion 3:5:2
 # getdns-0.3.3 had libversion 3:6:2
 # getdns-0.5.0 had libversion 4:0:3
-# getdns-0.5.1 will have libversion 4:1:3
+# getdns-0.5.1 has libversion 4:1:3
 #
 GETDNS_LIBVERSION=4:1:3