lib/obstacle.h: added missing include

diff --git a/lib/obstacle.h b/lib/obstacle.h
index 7d7bcac70f421a9d5007e8cca2fb6da0fa763f88..3cd98cbb092d81d8317528160be7dc6bc93f23db 100644 (file)
--- a/lib/obstacle.h
+++ b/lib/obstacle.h
@@ -12,6 +12,7 @@
 
 #include "lib/event.h"
 #include "lib/locking.h"
+#include "lib/string.h"
 #include "lib/tlists.h"
 
 #define TLIST_PREFIX obstacle