diff --git a/src/messages/MExportDirPrepAck.h b/src/messages/MExportDirPrepAck.h
index bb9bb13778d..d623d1acc09 100644
--- a/src/messages/MExportDirPrepAck.h
+++ b/src/messages/MExportDirPrepAck.h
@@ -20,7 +20,7 @@
 
 class MExportDirPrepAck : public Message {
   dirfrag_t dirfrag;
-  bool success;
+  bool success = false;
 
  public:
   dirfrag_t get_dirfrag() { return dirfrag; }
diff --git a/src/messages/MOSDECSubOpRead.h b/src/messages/MOSDECSubOpRead.h
index de9317e45a6..48a283c2060 100644
--- a/src/messages/MOSDECSubOpRead.h
+++ b/src/messages/MOSDECSubOpRead.h
@@ -24,7 +24,7 @@ class MOSDECSubOpRead : public MOSDFastDispatchOp {
 
 public:
   spg_t pgid;
-  epoch_t map_epoch, min_epoch;
+  epoch_t map_epoch = 0, min_epoch = 0;
   ECSubRead op;
 
   int get_cost() const override {
diff --git a/src/messages/MOSDECSubOpReadReply.h b/src/messages/MOSDECSubOpReadReply.h
index 7ad931445c9..4cc3547400b 100644
--- a/src/messages/MOSDECSubOpReadReply.h
+++ b/src/messages/MOSDECSubOpReadReply.h
@@ -24,7 +24,7 @@ class MOSDECSubOpReadReply : public MOSDFastDispatchOp {
 
 public:
   spg_t pgid;
-  epoch_t map_epoch, min_epoch;
+  epoch_t map_epoch = 0, min_epoch = 0;
   ECSubReadReply op;
 
   int get_cost() const override {
diff --git a/src/messages/MOSDECSubOpWrite.h b/src/messages/MOSDECSubOpWrite.h
index 72a272c6ab0..b1e6b8c361f 100644
--- a/src/messages/MOSDECSubOpWrite.h
+++ b/src/messages/MOSDECSubOpWrite.h
@@ -24,7 +24,7 @@ class MOSDECSubOpWrite : public MOSDFastDispatchOp {
 
 public:
   spg_t pgid;
-  epoch_t map_epoch, min_epoch;
+  epoch_t map_epoch = 0, min_epoch = 0;
   ECSubWrite op;
 
   int get_cost() const override {
diff --git a/src/messages/MOSDECSubOpWriteReply.h b/src/messages/MOSDECSubOpWriteReply.h
index 778a13d7984..e7ca5233bed 100644
--- a/src/messages/MOSDECSubOpWriteReply.h
+++ b/src/messages/MOSDECSubOpWriteReply.h
@@ -24,7 +24,7 @@ class MOSDECSubOpWriteReply : public MOSDFastDispatchOp {
 
 public:
   spg_t pgid;
-  epoch_t map_epoch, min_epoch;
+  epoch_t map_epoch = 0, min_epoch = 0;
   ECSubWriteReply op;
 
   int get_cost() const override {