diff --git a/src/wurfl.c b/src/wurfl.c
index 9f374fa..78288be 100644
--- a/src/wurfl.c
+++ b/src/wurfl.c
@@ -8,7 +8,7 @@
 #include <haproxy/errors.h>
 #include <haproxy/http_htx.h>
 #include <types/global.h>
-#include <proto/arg.h>
+#include <haproxy/arg.h>
 #include <proto/log.h>
 #include <proto/http_ana.h>
 #include <proto/http_fetch.h>