diff --git a/configure.ac b/configure.ac
index 8b50fb7..df9a193 100644
--- a/configure.ac
+++ b/configure.ac
@@ -73,6 +73,8 @@ AC_CHECK_FUNCS([ \
 	strtoul \
 ])
 
+# glibc versions before 2.17 needs to link with -lrt for clock_nanosleep
+AC_SEARCH_LIBS([clock_nanosleep], [rt])
 
 AC_CHECK_DECL(SO_RXQ_OVFL,,
     [AC_DEFINE([SO_RXQ_OVFL], [40], [SO_RXQ_OVFL])]