diff --git a/include/haproxy/pool-t.h b/include/haproxy/pool-t.h
index b6d4d31..7dc99c1 100644
--- a/include/haproxy/pool-t.h
+++ b/include/haproxy/pool-t.h
@@ -84,7 +84,6 @@
 
 struct pool_cache_head {
 	struct list list;    /* head of objects in this pool */
-	size_t size;         /* size of an object */
 	unsigned int count;  /* number of objects in this pool */
 } THREAD_ALIGNED(64);
 
diff --git a/include/haproxy/pool.h b/include/haproxy/pool.h
index ee97135..526c57c 100644
--- a/include/haproxy/pool.h
+++ b/include/haproxy/pool.h
@@ -94,7 +94,7 @@
 
 	item = LIST_NEXT(&ph->list, typeof(item), by_pool);
 	ph->count--;
-	pool_cache_bytes -= ph->size;
+	pool_cache_bytes -= pool->size;
 	pool_cache_count--;
 	LIST_DEL(&item->by_pool);
 	LIST_DEL(&item->by_lru);
@@ -117,7 +117,7 @@
 	LIST_ADD(&ti->pool_lru_head, &item->by_lru);
 	ph->count++;
 	pool_cache_count++;
-	pool_cache_bytes += ph->size;
+	pool_cache_bytes += pool->size;
 
 	if (unlikely(pool_cache_bytes > CONFIG_HAP_POOL_CACHE_SIZE))
 		pool_evict_from_cache();
diff --git a/src/pool.c b/src/pool.c
index 4f367d0..6f19ec7 100644
--- a/src/pool.c
+++ b/src/pool.c
@@ -111,7 +111,6 @@
 		/* update per-thread pool cache if necessary */
 		for (thr = 0; thr < MAX_THREADS; thr++) {
 			LIST_INIT(&pool->cache[thr].list);
-			pool->cache[thr].size = size;
 		}
 #endif
 		HA_SPIN_INIT(&pool->lock);
@@ -141,7 +140,7 @@
 		LIST_DEL(&item->by_lru);
 		ph->count--;
 		pool_cache_count--;
-		pool_cache_bytes -= ph->size;
+		pool_cache_bytes -= pool->size;
 		__pool_free(pool, item);
 	} while (pool_cache_bytes > CONFIG_HAP_POOL_CACHE_SIZE * 7 / 8);
 }