diff --git a/src/backend/commands/extension.c b/src/backend/commands/extension.c
index 1f85f223a0..057cf80eb7 100644
--- a/src/backend/commands/extension.c
+++ b/src/backend/commands/extension.c
@@ -1473,6 +1473,16 @@ CreateExtensionInternal(char *extensionName,
 		list_free(search_path);
 	}
 
+	/*
+	 * Prevent creation of extensions if attempting to use a temporary
+	 * schema as this would make the extension tied with the session
+	 * context, and this is a database-wide object.
+	 */
+	if (isTempNamespace(schemaOid))
+		ereport(ERROR,
+				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+				 errmsg("cannot create extensions using temporary schema")));
+
 	/*
 	 * We don't check creation rights on the target namespace here.  If the
 	 * extension script actually creates any objects there, it will fail if
diff --git a/src/test/modules/test_extensions/expected/test_extensions.out b/src/test/modules/test_extensions/expected/test_extensions.out
index 28d86c4b87..83db5a3d91 100644
--- a/src/test/modules/test_extensions/expected/test_extensions.out
+++ b/src/test/modules/test_extensions/expected/test_extensions.out
@@ -9,6 +9,28 @@ ERROR:  schema "test_ext" does not exist
 CREATE SCHEMA test_ext;
 CREATE EXTENSION test_ext1 SCHEMA test_ext;
 ERROR:  extension "test_ext1" must be installed in schema "test_ext1"
+-- creation of extension in temporary schema.  This function
+-- wrapper is useful for portability.
+-- First enforce presence of temporary schema.
+CREATE TEMP TABLE test_ext2_tab ();
+CREATE OR REPLACE FUNCTION create_extension_with_temp_schema()
+  RETURNS VOID AS $$
+  DECLARE
+    tmpschema text;
+    query text;
+  BEGIN
+    SELECT INTO tmpschema pg_my_temp_schema()::regnamespace;
+    query := 'CREATE EXTENSION test_ext2 SCHEMA ' || tmpschema || ';';
+    RAISE NOTICE 'query %', query;
+    EXECUTE query;
+  END; $$ LANGUAGE plpgsql;
+SELECT create_extension_with_temp_schema();
+NOTICE:  query CREATE EXTENSION test_ext2 SCHEMA pg_temp_3;
+ERROR:  cannot create extensions using temporary schema
+CONTEXT:  SQL statement "CREATE EXTENSION test_ext2 SCHEMA pg_temp_3;"
+PL/pgSQL function create_extension_with_temp_schema() line 9 at EXECUTE
+DROP TABLE test_ext2_tab;
+DROP FUNCTION create_extension_with_temp_schema();
 -- finally success
 CREATE EXTENSION test_ext1 SCHEMA test_ext CASCADE;
 NOTICE:  installing required extension "test_ext2"
diff --git a/src/test/modules/test_extensions/sql/test_extensions.sql b/src/test/modules/test_extensions/sql/test_extensions.sql
index 9e64503eb5..8a8079836b 100644
--- a/src/test/modules/test_extensions/sql/test_extensions.sql
+++ b/src/test/modules/test_extensions/sql/test_extensions.sql
@@ -5,6 +5,25 @@ CREATE EXTENSION test_ext1 SCHEMA test_ext;
 CREATE SCHEMA test_ext;
 CREATE EXTENSION test_ext1 SCHEMA test_ext;
 
+-- creation of extension in temporary schema.  This function
+-- wrapper is useful for portability.
+-- First enforce presence of temporary schema.
+CREATE TEMP TABLE test_ext2_tab ();
+CREATE OR REPLACE FUNCTION create_extension_with_temp_schema()
+  RETURNS VOID AS $$
+  DECLARE
+    tmpschema text;
+    query text;
+  BEGIN
+    SELECT INTO tmpschema pg_my_temp_schema()::regnamespace;
+    query := 'CREATE EXTENSION test_ext2 SCHEMA ' || tmpschema || ';';
+    RAISE NOTICE 'query %', query;
+    EXECUTE query;
+  END; $$ LANGUAGE plpgsql;
+SELECT create_extension_with_temp_schema();
+DROP TABLE test_ext2_tab;
+DROP FUNCTION create_extension_with_temp_schema();
+
 -- finally success
 CREATE EXTENSION test_ext1 SCHEMA test_ext CASCADE;