diff --git a/SabreTools.Serialization/UnshieldSharp/Reader.cs b/SabreTools.Serialization/UnshieldSharp/Reader.cs
index 56967ee6..e1b39070 100644
--- a/SabreTools.Serialization/UnshieldSharp/Reader.cs
+++ b/SabreTools.Serialization/UnshieldSharp/Reader.cs
@@ -110,15 +110,6 @@ namespace UnshieldSharpInternal
 
         #region Reading
 
-        /// <summary>
-        /// Open the next volume based on the current index
-        /// </summary>
-        public bool OpenNextVolume(out ushort nextVolume)
-        {
-            nextVolume = (ushort)(_volumeId + 1);
-            return OpenVolume(nextVolume);
-        }
-
         /// <summary>
         /// Read a certain number of bytes from the current volume
         /// </summary>
@@ -158,6 +149,15 @@ namespace UnshieldSharpInternal
             return true;
         }
 
+        /// <summary>
+        /// Open the next volume based on the current index
+        /// </summary>
+        private bool OpenNextVolume(out ushort nextVolume)
+        {
+            nextVolume = (ushort)(_volumeId + 1);
+            return OpenVolume(nextVolume);
+        }
+
         /// <summary>
         /// Open the volume at the inputted index
         /// </summary>