diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 94b57fa7bb..0a84d97f51 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -433,6 +433,7 @@ typedef struct
 	TimestampTz PgStartTime;
 	TimestampTz PgReloadTime;
 	bool		redirection_done;
+	bool		IsBinaryUpgrade;
 #ifdef WIN32
 	HANDLE		PostmasterHandle;
 	HANDLE		initial_signal_pipe;
@@ -4653,6 +4654,7 @@ save_backend_variables(BackendParameters *param, Port *port,
 	param->PgReloadTime = PgReloadTime;
 
 	param->redirection_done = redirection_done;
+	param->IsBinaryUpgrade = IsBinaryUpgrade;
 
 #ifdef WIN32
 	param->PostmasterHandle = PostmasterHandle;
@@ -4874,6 +4876,7 @@ restore_backend_variables(BackendParameters *param, Port *port)
 	PgReloadTime = param->PgReloadTime;
 
 	redirection_done = param->redirection_done;
+	IsBinaryUpgrade = param->IsBinaryUpgrade;
 
 #ifdef WIN32
 	PostmasterHandle = param->PostmasterHandle;