diff --git a/src/hlua.c b/src/hlua.c
index 06c45b6..5513a7d 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -26,6 +26,7 @@
 
 #include <common/cfgparse.h>
 #include <haproxy/thread.h>
+#include <haproxy/regex.h>
 #include <common/xref.h>
 #include <common/h1.h>
 #include <common/standard.h>