diff --git a/CHANGES b/CHANGES
index 2d827b9e1e..0d5779f469 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+3675.	[misc]		Provide a place for third parties to add version
+			information for their extensions in the version
+			file by setting the EXTENSIONS variable.
+
 	--- 9.10.0a1 released ---
 
 3674.	[bug]		RPZ zeroed ttls if the query type was '*'. [RT #35026]
diff --git a/configure b/configure
index 6d35415682..94b7006dec 100755
--- a/configure
+++ b/configure
@@ -19970,7 +19970,7 @@ BIND9_PRODUCT="PRODUCT=\"${PRODUCT}\""
 
 BIND9_DESCRIPTION="DESCRIPTION=\"${DESCRIPTION}\""
 
-BIND9_VERSION="VERSION=${MAJORVER}.${MINORVER}${PATCHVER:+.}${PATCHVER}${RELEASETYPE}${RELEASEVER}"
+BIND9_VERSION="VERSION=${MAJORVER}.${MINORVER}${PATCHVER:+.}${PATCHVER}${RELEASETYPE}${RELEASEVER}${EXTENSIONS}"
 
 BIND9_MAJOR="MAJOR=${MAJORVER}.${MINORVER}"
 
diff --git a/configure.in b/configure.in
index 1b7a17dd95..ab80032f8e 100644
--- a/configure.in
+++ b/configure.in
@@ -3483,7 +3483,7 @@ BIND9_PRODUCT="PRODUCT=\"${PRODUCT}\""
 AC_SUBST(BIND9_PRODUCT)
 BIND9_DESCRIPTION="DESCRIPTION=\"${DESCRIPTION}\""
 AC_SUBST(BIND9_DESCRIPTION)
-BIND9_VERSION="VERSION=${MAJORVER}.${MINORVER}${PATCHVER:+.}${PATCHVER}${RELEASETYPE}${RELEASEVER}"
+BIND9_VERSION="VERSION=${MAJORVER}.${MINORVER}${PATCHVER:+.}${PATCHVER}${RELEASETYPE}${RELEASEVER}${EXTENSIONS}"
 AC_SUBST(BIND9_VERSION)
 BIND9_MAJOR="MAJOR=${MAJORVER}.${MINORVER}"
 AC_SUBST(BIND9_MAJOR)
diff --git a/util/kit.sh b/util/kit.sh
index 6c6d7f3ed4..5c4cd91886 100644
--- a/util/kit.sh
+++ b/util/kit.sh
@@ -109,7 +109,7 @@ then
     esac
 fi
 
-version=${MAJORVER}.${MINORVER}${PATCHVER:+.}${PATCHVER}${RELEASETYPE}${RELEASEVER}
+version=${MAJORVER}.${MINORVER}${PATCHVER:+.}${PATCHVER}${RELEASETYPE}${RELEASEVER}${EXTENSIONS}
 
 echo "building release kit for BIND version $version, hold on..."
 
@@ -142,6 +142,7 @@ MINORVER=$MINORVER
 PATCHVER=$PATCHVER
 RELEASETYPE=$RELEASETYPE
 RELEASEVER=$RELEASEVER
+EXTENSIONS=$EXTENSIONS
 EOF
 fi
 
diff --git a/version b/version
index 971844fa03..00fa0207c1 100644
--- a/version
+++ b/version
@@ -10,3 +10,4 @@ MINORVER=10
 PATCHVER=0
 RELEASETYPE=a
 RELEASEVER=1
+EXTENSIONS=