diff --git a/configure b/configure
index ecb97be803f..c4e88897909 100755
--- a/configure
+++ b/configure
@@ -642,6 +642,7 @@ ac_includes_default="\
 
 ac_subst_vars='LTLIBOBJS
 vpath_build
+PG_VERSION_NUM
 OSX
 XSLTPROC
 COLLATEINDEX
@@ -29886,6 +29887,7 @@ _ACEOF
 
 
 
+
 # Begin output steps
 
 { $as_echo "$as_me:$LINENO: using compiler=$cc_string" >&5
diff --git a/configure.in b/configure.in
index 606b6ac5498..28fc6543042 100644
--- a/configure.in
+++ b/configure.in
@@ -1912,6 +1912,7 @@ AC_DEFINE_UNQUOTED(PG_VERSION_STR,
 tr '.' '	' |
 $AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"]
 AC_DEFINE_UNQUOTED(PG_VERSION_NUM, $PG_VERSION_NUM, [PostgreSQL version as a number])
+AC_SUBST(PG_VERSION_NUM)
 
 
 # Begin output steps
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index b10ce307163..d1e82d65404 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -34,6 +34,7 @@ all:
 # PostgreSQL version number
 VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
+VERSION_NUM = @PG_VERSION_NUM@
 
 # Support for VPATH builds
 vpath_build = @vpath_build@