diff --git a/include/sys/t_lock.h b/include/sys/t_lock.h
index 9e6f2ea3ff..0e7d8ae9e2 100644
--- a/include/sys/t_lock.h
+++ b/include/sys/t_lock.h
@@ -1,4 +1,9 @@
 #ifndef _SPL_T_LOCK_H
 #define _SPL_T_LOCK_H
 
+#include <sys/param.h>
+#include <sys/mutex.h>
+#include <sys/rwlock.h>
+#include <sys/condvar.h>
+
 #endif /* SPL_T_LOCK_H */