diff --git a/NEWS b/NEWS
index d8df7d0ed50..daaa3611eee 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,8 @@ PHP                                                                        NEWS
   . Fixed bug #81656 (GCC-11 silently ignores -R). (Michael Wallner)
   . Fixed bug #81683 (Misleading "access type ... must be public" error message
     on final or abstract interface methods). (ilutov)
+  . Fixed bug #81585 (cached_chunks are not counted to real_size on shutdown).
+    (cmb)
 
 - MBString:
   . Fixed bug #81693 (mb_check_encoding(7bit) segfaults). (cmb)
diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 6af234b4d75..04b1a4ff19d 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -2304,10 +2304,10 @@ void zend_mm_shutdown(zend_mm_heap *heap, bool full, bool silent)
 #endif
 		memset(heap->free_slot, 0, sizeof(heap->free_slot));
 #if ZEND_MM_STAT || ZEND_MM_LIMIT
-		heap->real_size = ZEND_MM_CHUNK_SIZE;
+		heap->real_size = (heap->cached_chunks_count + 1) * ZEND_MM_CHUNK_SIZE;
 #endif
 #if ZEND_MM_STAT
-		heap->real_peak = ZEND_MM_CHUNK_SIZE;
+		heap->real_peak = (heap->cached_chunks_count + 1) * ZEND_MM_CHUNK_SIZE;
 #endif
 		heap->chunks_count = 1;
 		heap->peak_chunks_count = 1;