diff --git a/SabreTools.Library/Dats/Disk.cs b/SabreTools.Library/Dats/Disk.cs
index d00d488d..50133a2c 100644
--- a/SabreTools.Library/Dats/Disk.cs
+++ b/SabreTools.Library/Dats/Disk.cs
@@ -128,11 +128,11 @@ namespace SabreTools.Library.Dats
 			}
 
 			// If we can determine that the disks have no non-empty hashes in common, we return false
-			if (!(String.IsNullOrEmpty(_md5) && String.IsNullOrEmpty(newOther.MD5))
-				|| !(String.IsNullOrEmpty(_sha1) && String.IsNullOrEmpty(newOther.SHA1))
-				|| !(String.IsNullOrEmpty(_sha256) && String.IsNullOrEmpty(newOther.SHA256))
-				|| !(String.IsNullOrEmpty(_sha384) && String.IsNullOrEmpty(newOther.SHA384))
-				|| !(String.IsNullOrEmpty(_sha512) && String.IsNullOrEmpty(newOther.SHA512)))
+			if ((String.IsNullOrEmpty(_md5) || String.IsNullOrEmpty(newOther.MD5))
+				&& (String.IsNullOrEmpty(_sha1) || String.IsNullOrEmpty(newOther.SHA1))
+				&& (String.IsNullOrEmpty(_sha256) || String.IsNullOrEmpty(newOther.SHA256))
+				&& (String.IsNullOrEmpty(_sha384) || String.IsNullOrEmpty(newOther.SHA384))
+				&& (String.IsNullOrEmpty(_sha512) || String.IsNullOrEmpty(newOther.SHA512)))
 			{
 				dupefound = false;
 			}
diff --git a/SabreTools.Library/Dats/Rom.cs b/SabreTools.Library/Dats/Rom.cs
index 87db75ca..ab7783f1 100644
--- a/SabreTools.Library/Dats/Rom.cs
+++ b/SabreTools.Library/Dats/Rom.cs
@@ -159,13 +159,13 @@ namespace SabreTools.Library.Dats
 			}
 
 			// If we can determine that the roms have no non-empty hashes in common, we return false
-			if (!(String.IsNullOrEmpty(_crc) && String.IsNullOrEmpty(newOther.CRC))
-				|| !(String.IsNullOrEmpty(_md5) && String.IsNullOrEmpty(newOther.MD5))
-				|| !(String.IsNullOrEmpty(_sha1) && String.IsNullOrEmpty(newOther.SHA1))
-				|| !(String.IsNullOrEmpty(_sha256) && String.IsNullOrEmpty(newOther.SHA256))
-				|| !(String.IsNullOrEmpty(_sha384) && String.IsNullOrEmpty(newOther.SHA384))
-				|| !(String.IsNullOrEmpty(_sha512) && String.IsNullOrEmpty(newOther.SHA512)))
-		{
+			if ((String.IsNullOrEmpty(_crc) || String.IsNullOrEmpty(newOther.CRC))
+				&& (String.IsNullOrEmpty(_md5) || String.IsNullOrEmpty(newOther.MD5))
+				&& (String.IsNullOrEmpty(_sha1) || String.IsNullOrEmpty(newOther.SHA1))
+				&& (String.IsNullOrEmpty(_sha256) || String.IsNullOrEmpty(newOther.SHA256))
+				&& (String.IsNullOrEmpty(_sha384) || String.IsNullOrEmpty(newOther.SHA384))
+				&& (String.IsNullOrEmpty(_sha512) || String.IsNullOrEmpty(newOther.SHA512)))
+			{
 				dupefound = false;
 			}
 			else if ((this.Size == newOther.Size)