diff --git a/src/vars.c b/src/vars.c
index 2e32583..9ba1720 100644
--- a/src/vars.c
+++ b/src/vars.c
@@ -8,6 +8,7 @@
 #include <haproxy/http.h>
 #include <haproxy/http_rules.h>
 #include <haproxy/list.h>
+#include <haproxy/log.h>
 #include <haproxy/sample.h>
 #include <haproxy/stream-t.h>
 #include <haproxy/tcpcheck.h>