common/Cond.h: include necessary header

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/common/Cond.h b/src/common/Cond.h
index 77b3882abb61b4d50bec3a29104127d656a9965a..efcb24166e9cabf7353f042a6820445c2b3f9218 100644 (file)
--- a/src/common/Cond.h
+++ b/src/common/Cond.h
@@ -17,6 +17,7 @@
 #define CEPH_COND_H
 
 #include "common/Clock.h"
+#include "common/Mutex.h"
 #include "include/Context.h"
 
 class Cond {