diff --git a/src/store_memcached.c b/src/store_memcached.c
index 8ddf8a4c..981b8b10 100644
--- a/src/store_memcached.c
+++ b/src/store_memcached.c
@@ -264,6 +264,7 @@ static int memcached_metatile_expire(struct storage_backend * store, const char
 static int memcached_close_storage(struct storage_backend * store)
 {
 	memcached_free(store->storage_ctx);
+	store->storage_ctx = NULL;
 	return 0;
 }
 
diff --git a/src/store_rados.c b/src/store_rados.c
index 2d6d311a..c057a804 100644
--- a/src/store_rados.c
+++ b/src/store_rados.c
@@ -329,6 +329,7 @@ static int rados_close_storage(struct storage_backend * store)
 	free(ctx->metadata_cache.data);
 	free(ctx->pool);
 	free(ctx);
+	store->storage_ctx = NULL;
 	return 0;
 }
 
diff --git a/src/store_ro_composite.c b/src/store_ro_composite.c
index 998be917..8faf4b4d 100644
--- a/src/store_ro_composite.c
+++ b/src/store_ro_composite.c
@@ -210,7 +210,7 @@ static int ro_composite_close_storage(struct storage_backend * store)
 	}
 
 	free(ctx);
-	free(store);
+	store->storage_ctx = NULL;
 	return 0;
 }
 
diff --git a/src/store_ro_http_proxy.c b/src/store_ro_http_proxy.c
index 00f95b2e..69925fb7 100644
--- a/src/store_ro_http_proxy.c
+++ b/src/store_ro_http_proxy.c
@@ -242,8 +242,7 @@ static int ro_http_proxy_close_storage(struct storage_backend * store)
 
 	curl_easy_cleanup(ctx->ctx);
 	free(ctx);
-	free(store);
-
+	store->storage_ctx = NULL;
 	return 0;
 }