diff --git a/SabreTools.Helper/Dats/Partials/DatFile.Rebuild.cs b/SabreTools.Helper/Dats/Partials/DatFile.Rebuild.cs
index e631a9b2..79d19ccf 100644
--- a/SabreTools.Helper/Dats/Partials/DatFile.Rebuild.cs
+++ b/SabreTools.Helper/Dats/Partials/DatFile.Rebuild.cs
@@ -537,6 +537,9 @@ namespace SabreTools.Helper.Dats
 					return rebuilt;
 				}
 
+				// Seek to the beginning of the stream
+				fileStream.Seek(0, SeekOrigin.Begin);
+
 				Globals.Logger.User("Matches found for '" + Style.GetFileName(rom.Name) + "', rebuilding accordingly...");
 				rebuilt = true;
 
diff --git a/SabreTools.Helper/Tools/ArchiveTools.cs b/SabreTools.Helper/Tools/ArchiveTools.cs
index 185b1981..d35f659c 100644
--- a/SabreTools.Helper/Tools/ArchiveTools.cs
+++ b/SabreTools.Helper/Tools/ArchiveTools.cs
@@ -1576,6 +1576,7 @@ namespace SabreTools.Helper.Tools
 				if (!File.Exists(archiveFileName))
 				{
 					// Copy the input stream to the output
+					inputStream.Seek(0, SeekOrigin.Begin);
 					tarFile.AddEntry(rom.Name, inputStream);
 				}
 
@@ -1624,6 +1625,7 @@ namespace SabreTools.Helper.Tools
 						if (index < 0)
 						{
 							// Copy the input file to the output
+							inputStream.Seek(0, SeekOrigin.Begin);
 							tarFile.AddEntry(rom.Name, inputStream);
 						}
 
@@ -1871,6 +1873,9 @@ namespace SabreTools.Helper.Tools
 				return success;
 			}
 
+			// Seek to the beginning of the stream
+			inputStream.Seek(0, SeekOrigin.Begin);
+
 			// Get the output archive name from the first rebuild rom
 			string archiveFileName = Path.Combine(outDir, Style.RemovePathUnsafeCharacters(rom.Machine.Name) + (rom.Machine.Name.EndsWith(".7z") ? "" : ".7z"));
 
@@ -2273,7 +2278,7 @@ namespace SabreTools.Helper.Tools
 			if (!inputStream.CanRead)
 			{
 				return success;
-			}
+			}			
 
 			// Make sure the output directory exists
 			if (!Directory.Exists(outDir))
@@ -2442,6 +2447,9 @@ namespace SabreTools.Helper.Tools
 				return success;
 			}
 
+			// Seek to the beginning of the stream
+			inputStream.Seek(0, SeekOrigin.Begin);
+
 			// Get the output archive name from the first rebuild rom
 			string archiveFileName = Path.Combine(outDir, Style.RemovePathUnsafeCharacters(rom.Machine.Name) + (rom.Machine.Name.EndsWith(".xz") ? "" : ".xz"));
 
@@ -2845,7 +2853,7 @@ namespace SabreTools.Helper.Tools
 				return success;
 			}
 
-			// Set the stream position
+			// Seek to the beginning of the stream
 			inputStream.Seek(0, SeekOrigin.Begin);
 
 			// Get the output archive name from the first rebuild rom
diff --git a/SabreTools.Helper/Tools/FileTools.cs b/SabreTools.Helper/Tools/FileTools.cs
index 5f12a7f4..8f927240 100644
--- a/SabreTools.Helper/Tools/FileTools.cs
+++ b/SabreTools.Helper/Tools/FileTools.cs
@@ -839,6 +839,9 @@ namespace SabreTools.Helper.Tools
 			}
 			finally
 			{
+				// Seek to the beginning of the stream
+				input.Seek(0, SeekOrigin.Begin);
+
 				if (!keepReadOpen)
 				{
 					input.Dispose();