diff --git a/src/memory/mempool.c b/src/memory/mempool.c
index fd59e82d..1e2eb904 100644
--- a/src/memory/mempool.c
+++ b/src/memory/mempool.c
@@ -8,16 +8,7 @@
 
 #include "mempool.h"
 
-void mempool_generic_init(
-	MemPool *pool,
-	MemArena *arena
-) {
-	*pool = (MemPool) {
-		.arena = arena,
-	};
-}
-
-void *mempool_generic_acquire(MemPool *pool, size_t size, size_t align) {
+void *mempool_generic_acquire(MemPool *pool, MemArena *arena, size_t size, size_t align) {
 	MemPoolObjectHeader *obj = pool->free_objects.as_generic;
 
 	if(obj) {
@@ -25,7 +16,7 @@ void *mempool_generic_acquire(MemPool *pool, size_t size, size_t align) {
 		pool->free_objects.as_generic = obj->next;
 	} else {
 		assert(pool->num_used == pool->num_allocated);
-		obj = marena_alloc_aligned(pool->arena, size, align);
+		obj = marena_alloc_aligned(arena, size, align);
 		++pool->num_allocated;
 	}
 
diff --git a/src/memory/mempool.h b/src/memory/mempool.h
index 7823c390..78763c38 100644
--- a/src/memory/mempool.h
+++ b/src/memory/mempool.h
@@ -16,7 +16,6 @@ typedef struct MemPoolObjectHeader {
 } MemPoolObjectHeader;
 
 #define MEMPOOL_BASE(elem_type) struct { \
-	MemArena *arena; \
 	union { \
 		MemPoolObjectHeader *as_generic; \
 		elem_type *as_specific; \
@@ -49,22 +48,17 @@ typedef MEMPOOL_BASE(max_align_t) MemPool;
 #define MEMPOOL_OBJTYPE(mpool) \
 	typeof(*(mpool)->free_objects.as_specific)
 
-void mempool_generic_init(MemPool *pool, MemArena *arena)
-	attr_nonnull(1, 2);
-
-void *mempool_generic_acquire(MemPool *pool, size_t size, size_t align)
-	attr_returns_allocated attr_hot attr_nonnull(1);
+void *mempool_generic_acquire(MemPool *pool, MemArena *arena, size_t size, size_t align)
+	attr_returns_allocated attr_hot attr_nonnull(1, 2);
 
 void mempool_generic_release(MemPool *pool, void *object)
 	attr_hot attr_nonnull(1, 2);
 
-#define mempool_init(mpool, arena) \
-	mempool_generic_init(MEMPOOL_CAST_TO_BASE(mpool), (arena));
-
-#define mempool_acquire(mpool) ({ \
+#define mempool_acquire(mpool, arena) ({ \
 	auto _mpool = mpool; \
 	MEMPOOL_OBJTYPE(_mpool) *_obj = mempool_generic_acquire(\
 		MEMPOOL_CAST_TO_BASE(_mpool), \
+		(arena), \
 		sizeof(MEMPOOL_OBJTYPE(_mpool)), \
 		alignof(MEMPOOL_OBJTYPE(_mpool))); \
 	*_obj = (typeof(*_obj)) {} ; \
diff --git a/src/stageobjects.c b/src/stageobjects.c
index 74c31113..588c4c58 100644
--- a/src/stageobjects.c
+++ b/src/stageobjects.c
@@ -19,11 +19,7 @@ void stage_objpools_init(void) {
 		marena_reset(&stage_objects.arena);
 	}
 
-	#define INIT_POOL(type, field) \
-		mempool_init(&stage_objects.pools.field, &stage_objects.arena);
-
-	OBJECT_POOLS(INIT_POOL)
-	#undef INIT_POOL
+	stage_objects.pools = (typeof(stage_objects.pools)) {};
 }
 
 void stage_objpools_shutdown(void) {
diff --git a/src/stageobjects.h b/src/stageobjects.h
index a852d655..4d5ab53f 100644
--- a/src/stageobjects.h
+++ b/src/stageobjects.h
@@ -66,7 +66,7 @@ void stage_objpools_init(void);
 void stage_objpools_shutdown(void);
 
 #define STAGE_ACQUIRE_OBJ(_type) \
-	mempool_acquire(STAGE_OBJPOOL_BY_TYPE(_type))
+	mempool_acquire(STAGE_OBJPOOL_BY_TYPE(_type), &stage_objects.arena)
 
 #define STAGE_RELEASE_OBJ(_p_obj) \
 	mempool_release(STAGE_OBJPOOL_BY_VARTYPE(_p_obj), (_p_obj))