diff --git a/libs/sofia-sip/.update b/libs/sofia-sip/.update
index 7c5f144d8b..a7b8ddb14a 100644
--- a/libs/sofia-sip/.update
+++ b/libs/sofia-sip/.update
@@ -1 +1 @@
-Tue Mar 24 10:46:04 CDT 2009
+Tue Mar 24 10:46:45 CDT 2009
diff --git a/libs/sofia-sip/configure.ac b/libs/sofia-sip/configure.ac
index d534905c6a..45e2a88b7d 100644
--- a/libs/sofia-sip/configure.ac
+++ b/libs/sofia-sip/configure.ac
@@ -110,6 +110,12 @@ if test x"$have_check" = "xyes"; then
 fi
 AC_CHECK_HEADERS([fnmatch.h])
 
+dnl dl is currently used only in testing
+AC_CHECK_LIB([dl], [dlopen], [
+   dnl Note: -ldl is not added to LIBS
+   AC_DEFINE([HAVE_LIBDL], 1, [Define to 1 if dl library is available])
+])
+
 ### internal modules
 ### ----------------
 AC_DEFINE([HAVE_SOFIA_SIP], 1, [Define to 1 always])