1 files changed, 3 insertions, 0 deletions
diff --git a/src/tag_pool.h b/src/tag_pool.h
index e19b2f4b4..d837d4446 100644
--- a/src/tag_pool.h
+++ b/src/tag_pool.h
@@ -20,6 +20,9 @@
 #define TAG_POOL_H
 
 #include "tag.h"
+#include "os_compat.h"
+
+extern pthread_mutex_t tag_pool_lock;
 
 struct tag_item;