diff --git a/src/backend/commands/portalcmds.c b/src/backend/commands/portalcmds.c
index b5ce87a29d2..03c7f0722ce 100644
--- a/src/backend/commands/portalcmds.c
+++ b/src/backend/commands/portalcmds.c
@@ -274,7 +274,8 @@ PortalCleanup(Portal portal)
 			saveResourceOwner = CurrentResourceOwner;
 			PG_TRY();
 			{
-				CurrentResourceOwner = portal->resowner;
+				if (portal->resowner)
+					CurrentResourceOwner = portal->resowner;
 				ExecutorFinish(queryDesc);
 				ExecutorEnd(queryDesc);
 				FreeQueryDesc(queryDesc);
@@ -349,7 +350,8 @@ PersistHoldablePortal(Portal portal)
 	PG_TRY();
 	{
 		ActivePortal = portal;
-		CurrentResourceOwner = portal->resowner;
+		if (portal->resowner)
+			CurrentResourceOwner = portal->resowner;
 		PortalContext = PortalGetHeapMemory(portal);
 
 		MemoryContextSwitchTo(PortalContext);
diff --git a/src/backend/tcop/pquery.c b/src/backend/tcop/pquery.c
index ce5e5e29ddb..30140b18737 100644
--- a/src/backend/tcop/pquery.c
+++ b/src/backend/tcop/pquery.c
@@ -478,7 +478,8 @@ PortalStart(Portal portal, ParamListInfo params,
 	PG_TRY();
 	{
 		ActivePortal = portal;
-		CurrentResourceOwner = portal->resowner;
+		if (portal->resowner)
+			CurrentResourceOwner = portal->resowner;
 		PortalContext = PortalGetHeapMemory(portal);
 
 		oldContext = MemoryContextSwitchTo(PortalGetHeapMemory(portal));
@@ -762,7 +763,8 @@ PortalRun(Portal portal, long count, bool isTopLevel,
 	PG_TRY();
 	{
 		ActivePortal = portal;
-		CurrentResourceOwner = portal->resowner;
+		if (portal->resowner)
+			CurrentResourceOwner = portal->resowner;
 		PortalContext = PortalGetHeapMemory(portal);
 
 		MemoryContextSwitchTo(PortalContext);
@@ -1411,7 +1413,8 @@ PortalRunFetch(Portal portal,
 	PG_TRY();
 	{
 		ActivePortal = portal;
-		CurrentResourceOwner = portal->resowner;
+		if (portal->resowner)
+			CurrentResourceOwner = portal->resowner;
 		PortalContext = PortalGetHeapMemory(portal);
 
 		oldContext = MemoryContextSwitchTo(PortalContext);