diff --git a/configure.in b/configure.in
index ca9971ffb..671b490ed 100644
--- a/configure.in
+++ b/configure.in
@@ -617,10 +617,6 @@ if test "${THREAD_PACKAGE}" != "" ; then
     AC_CHECK_LIB(pthread, main)
   fi
 fi
-AC_SUBST(LIBGUILEQTHREADS_INTERFACE_CURRENT)
-AC_SUBST(LIBGUILEQTHREADS_INTERFACE_REVISION)
-AC_SUBST(LIBGUILEQTHREADS_INTERFACE_AGE)
-AC_SUBST(LIBGUILEQTHREADS_INTERFACE)
 
 ## If we're using GCC, ask for aggressive warnings.
 case "$GCC" in
@@ -653,11 +649,31 @@ AC_SUBST(GUILE_MINOR_VERSION)
 AC_SUBST(GUILE_MICRO_VERSION)
 AC_SUBST(GUILE_VERSION)
 
+#######################################################################
+# library versioning
+
+AC_SUBST(LIBQTHREADS_INTERFACE_CURRENT)
+AC_SUBST(LIBQTHREADS_INTERFACE_REVISION)
+AC_SUBST(LIBQTHREADS_INTERFACE_AGE)
+AC_SUBST(LIBQTHREADS_INTERFACE)
+
 AC_SUBST(LIBGUILE_INTERFACE_CURRENT)
 AC_SUBST(LIBGUILE_INTERFACE_REVISION)
 AC_SUBST(LIBGUILE_INTERFACE_AGE)
 AC_SUBST(LIBGUILE_INTERFACE)
 
+AC_SUBST(LIBGUILE_SRFI_SRFI_4_INTERFACE_CURRENT)
+AC_SUBST(LIBGUILE_SRFI_SRFI_4_INTERFACE_REVISION)
+AC_SUBST(LIBGUILE_SRFI_SRFI_4_INTERFACE_AGE)
+AC_SUBST(LIBGUILE_SRFI_SRFI_4_INTERFACE)
+
+AC_SUBST(LIBGUILE_SRFI_SRFI_13_14_INTERFACE_CURRENT)
+AC_SUBST(LIBGUILE_SRFI_SRFI_13_14_INTERFACE_REVISION)
+AC_SUBST(LIBGUILE_SRFI_SRFI_13_14_INTERFACE_AGE)
+AC_SUBST(LIBGUILE_SRFI_SRFI_13_14_INTERFACE)
+
+#######################################################################
+
 dnl Tell guile-config what flags guile users should link against.
 GUILE_LIBS="$LDFLAGS $THREAD_LIBS_INSTALLED $LIBS"
 AC_SUBST(GUILE_LIBS)