diff --git a/src/examples/cpp11/Makefile.am b/src/examples/cpp11/Makefile.am
index a132a469f..65eb90a6d 100644
--- a/src/examples/cpp11/Makefile.am
+++ b/src/examples/cpp11/Makefile.am
@@ -289,9 +289,9 @@ endif
 
 if HAVE_BOOST_COROUTINE
 spawn_echo_server_SOURCES = spawn/echo_server.cpp
-spawn_echo_server_LDADD = $(LDADD) -lboost_coroutine -lboost_context -lboost_thread -lboost_chrono -lboost_system
+spawn_echo_server_LDADD = $(LDADD) -lboost_coroutine -lboost_context -lboost_thread -lboost_chrono
 spawn_parallel_grep_SOURCES = spawn/parallel_grep.cpp
-spawn_parallel_grep_LDADD = $(LDADD) -lboost_coroutine -lboost_context -lboost_thread -lboost_chrono -lboost_system
+spawn_parallel_grep_LDADD = $(LDADD) -lboost_coroutine -lboost_context -lboost_thread -lboost_chrono
 endif
 
 EXTRA_DIST = \