diff --git a/http_check/Makefile b/http_check/Makefile
index 33e63d9..2ae5792 100644
--- a/http_check/Makefile
+++ b/http_check/Makefile
@@ -1,7 +1,7 @@
 all:
-	gcc -fPIC -shared src/http_check.c -o http_check.so -levent -lcjson
+	gcc -fPIC -shared src/http_check.c -o http_check.so -levent -lcjson -lpthread
 debug:
-	gcc -g -fPIC -shared src/http_check.c -o http_check.so -levent -lcjson
+	gcc -g -fPIC -shared src/http_check.c -o http_check.so -levent -lcjson -lpthread
 
 clean:
 	rm *.so *.o -rf