diff --git a/com.sebaslab.svelto.ecs/DataStructures/Unmanaged/UnsafeBlob.cs b/com.sebaslab.svelto.ecs/DataStructures/Unmanaged/UnsafeBlob.cs
index 3acd50b..dd6b628 100644
--- a/com.sebaslab.svelto.ecs/DataStructures/Unmanaged/UnsafeBlob.cs
+++ b/com.sebaslab.svelto.ecs/DataStructures/Unmanaged/UnsafeBlob.cs
@@ -231,7 +231,7 @@ namespace Svelto.ECS.DataStructures
                 ptr      = newPointer;
                 capacity = newCapacity;
 
-                //_readIndex  = 0;
+                //_readIndex  = 0; readIndex won't change to keep the previous reserved indices valid
                 _writeIndex = _readIndex + currentSize;
             }
         }