diff --git a/ecs/src/entities.zig b/ecs/src/entities.zig
index 28c8cf93..2fa0a415 100644
--- a/ecs/src/entities.zig
+++ b/ecs/src/entities.zig
@@ -166,6 +166,9 @@ pub const ArchetypeStorage = struct {
             offset += new_capacity * column.size;
         }
 
+        if (storage.capacity > 0) {
+            gpa.free(storage.block);
+        }
         storage.block = new_block;
         storage.capacity = @intCast(u32, new_capacity);
     }