diff --git a/ChangeLog b/ChangeLog
index 30e0ad95c..694d6f415 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2001-04-12  Niibe Yutaka  <gniibe@m17n.org>
+
+	* GUILE-VERSION (LIBGUILEQTHREADS_MAJOR_VERSION,
+	LIBGUILEQTHREADS_MINOR_VERSION, LIBGUILEQTHREADS_REVISION_VERSION,
+	LIBGUILEQTHREADS_VERSION): Added libguileqthreads version info.
+
+	* configure.in: Likewise.
+
 2001-04-11  Keisuke Nishida  <kxn30@po.cwru.edu>
 
 	* configure.in (AC_CHECK_FUNCS): Don't check bzero.
diff --git a/GUILE-VERSION b/GUILE-VERSION
index 0d61f1b50..1058c0aca 100644
--- a/GUILE-VERSION
+++ b/GUILE-VERSION
@@ -11,3 +11,9 @@ LIBGUILE_MAJOR_VERSION=10
 LIBGUILE_MINOR_VERSION=0
 LIBGUILE_REVISION_VERSION=0
 LIBGUILE_VERSION=${LIBGUILE_MAJOR_VERSION}.${LIBGUILE_MINOR_VERSION}.${LIBGUILE_REVISION_VERSION}
+
+# libguileqthreads.so versioning info
+LIBGUILEQTHREADS_MAJOR_VERSION=0
+LIBGUILEQTHREADS_MINOR_VERSION=0
+LIBGUILEQTHREADS_REVISION_VERSION=0
+LIBGUILEQTHREADS_VERSION=${LIBGUILEQTHREADS_MAJOR_VERSION}.${LIBGUILEQTHREADS_MINOR_VERSION}.${LIBGUILEQTHREADS_REVISION_VERSION}
diff --git a/THANKS b/THANKS
index 142814adc..9b98b45a7 100644
--- a/THANKS
+++ b/THANKS
@@ -38,3 +38,4 @@ For fixes or providing information which led to a fix:
       Brett Viren
     William Webber
       Keith Wright
+      Niibe Yutaka
diff --git a/configure.in b/configure.in
index 0b7242880..dc44f96cc 100644
--- a/configure.in
+++ b/configure.in
@@ -493,6 +493,10 @@ if test "${THREAD_PACKAGE}" != "" ; then
     AC_CHECK_LIB(pthread, main)
   fi
 fi
+AC_SUBST(LIBGUILEQTHREADS_MAJOR_VERSION)
+AC_SUBST(LIBGUILEQTHREADS_MINOR_VERSION)
+AC_SUBST(LIBGUILEQTHREADS_REVISION_VERSION)
+AC_SUBST(LIBGUILEQTHREADS_VERSION)
 
 ## If we're using GCC, ask for aggressive warnings.
 case "$GCC" in