diff --git a/CMakeLists.txt b/CMakeLists.txt
index ac6f827..cbbb8e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,7 +33,7 @@ target_link_libraries(example-sync lwmqtt)
 
 add_executable(example-async examples/async.c)
 
-target_link_libraries(example-async lwmqtt)
+target_link_libraries(example-async lwmqtt pthread)
 
 set(TEST_FILES
         tests/client.cpp