diff --git a/include/wsrep/client_service.hpp b/include/wsrep/client_service.hpp
index 78d097d..f5038a6 100644
--- a/include/wsrep/client_service.hpp
+++ b/include/wsrep/client_service.hpp
@@ -220,7 +220,7 @@ namespace wsrep
 #ifdef WITH_WSREP_SR_SPEEDUP
 
 	/**
-	 * Return the binlog cache for the currently execution
+	 * Return the binlog cache for the currently executing
 	 * transaction or a NULL pointer if no such cache exists.
 	 */
 	virtual void *get_binlog_cache() = 0;
diff --git a/include/wsrep/transaction.hpp b/include/wsrep/transaction.hpp
index 942d216..d8ab30a 100644
--- a/include/wsrep/transaction.hpp
+++ b/include/wsrep/transaction.hpp
@@ -145,6 +145,44 @@ namespace wsrep
 #ifdef WITH_WSREP_SR_SPEEDUP
 	int set_fragments_from_table();
 	void *get_binlog_cache();
+        /* state of Streaming Replication Speedup feature for the
+           transaction. This describes the relationship of this WSREP
+           transaction and the underlying InnoDB transaction.
+        */
+        enum sr_state
+        {
+            /* this is not an SR Speedup transaction */
+            sr_state_none,
+            /* this is an SR Speedup transaction, but SR XID is not set
+               for the underlying InnoDB transaction
+             */
+            sr_state_require_xid,
+            /* this is an SR Speedup transaction, and SR XID is set
+               for the underlying InnoDB transaction
+             */
+            sr_state_xid_set
+        };
+        static const int n_sr_states = sr_state_xid_set + 1;
+        enum sr_state sr_state() const
+        { return sr_state_; }
+        void require_sr_xid()
+        {
+          if (sr_state_ == sr_state_none) {
+            sr_state_ = sr_state_require_xid;
+          }
+        }
+        void sr_xid_was_set()
+        {
+          sr_state_ = sr_state_xid_set;
+        }
+        bool sr_xid_is_required()
+        {
+          return sr_state_ == sr_state_require_xid;
+        }
+        bool sr_xid_is_set()
+        {
+          return sr_state_ == sr_state_xid_set;
+        }
 #endif /* WITH_WSREP_SR_SPEEDUP */
 
         bool pa_unsafe() const { return pa_unsafe_; }
@@ -277,6 +315,9 @@ namespace wsrep
         wsrep::sr_key_set sr_keys_;
         wsrep::mutable_buffer apply_error_buf_;
         wsrep::xid xid_;
+#ifdef WITH_WSREP_SR_SPEEDUP
+        enum sr_state sr_state_;
+#endif /* WITH_WSREP_SR_SPEEDUP */
     };
 
     static inline const char* to_c_string(enum wsrep::transaction::state state)
diff --git a/src/server_state.cpp b/src/server_state.cpp
index 9cecf17..7f4421c 100644
--- a/src/server_state.cpp
+++ b/src/server_state.cpp
@@ -685,6 +685,9 @@ int wsrep::server_state::start_sst(const std::string& sst_request,
     state(lock, s_donor);
     int ret(0);
     lock.unlock();
+#ifdef DEBUG_SR_SPEEDUP
+    wsrep::log_info() << __FUNCTION__ << "(" << __LINE__ << ")";
+#endif /* DEBUG_SR_SPEEDUP */
     if (server_service_.start_sst(sst_request, gtid, bypass))
     {
         lock.lock();
diff --git a/src/transaction.cpp b/src/transaction.cpp
index 16bd5eb..0622622 100644
--- a/src/transaction.cpp
+++ b/src/transaction.cpp
@@ -132,6 +132,9 @@ int wsrep::transaction::start_transaction(
     server_id_ = client_state_.server_state().id();
     id_ = id;
     state_ = s_executing;
+#ifdef WITH_WSREP_SR_SPEEDUP
+    sr_state_ = sr_state_none;
+#endif /* WITH_WSREP_SR_SPEEDUP */
     state_hist_.clear();
     ws_handle_ = wsrep::ws_handle(id);
     flags(wsrep::provider::flag::start_transaction);
@@ -1764,8 +1767,14 @@ int wsrep::transaction::certify_fragment(
         flags(flags() & ~wsrep::provider::flag::start_transaction);
     }
 #ifdef DEBUG_SR_SPEEDUP
-    wsrep::log_info() << "END certify_fragment";
+    wsrep::log_info() << "END certify_fragment: "
+                      << "wsrep_get_current_thd() = "
+                      << wsrep_get_current_thd()
+                      << ", sr_state = " << (int)sr_state();
 #endif /* DEBUG_SR_SPEEDUP */
+#ifdef WITH_WSREP_SR_SPEEDUP
+    require_sr_xid();
+#endif /* WITH_WSREP_SR_SPEEDUP */
     return ret;
 }