diff --git a/configure.ac b/configure.ac
index 165623ae..6f853930 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,6 +60,7 @@ CC="$PTHREAD_CC"
 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
 LIBS="$PTHREAD_LIBS $LIBS"
 
+AC_CHECK_LIB([rt],[clock_gettime])
 
 AX_CHECK_OPENSSL([
 	AC_SUBST(OPENSSL_LIBS)