diff --git a/libs/sofia-sip/configure.ac b/libs/sofia-sip/configure.ac
index 0eb2418ad9..196d815157 100644
--- a/libs/sofia-sip/configure.ac
+++ b/libs/sofia-sip/configure.ac
@@ -53,6 +53,7 @@ AC_CHECK_PROG(ETAGS, etags, etags, echo)
 AC_CHECK_TOOL(AR, ar, ar)
 AC_CHECK_TOOL(LD, ld, ld)
 AC_PROG_LIBTOOL
+AM_PROG_CC_C_O
 
 SAC_ENABLE_NDEBUG
 SAC_ENABLE_EXPENSIVE_CHECKS