diff --git a/ArcFormats/Ism/ArcISA.cs b/ArcFormats/Ism/ArcISA.cs
index 40f1d764..164efbb5 100644
--- a/ArcFormats/Ism/ArcISA.cs
+++ b/ArcFormats/Ism/ArcISA.cs
@@ -44,7 +44,7 @@ namespace GameRes.Formats.ISM
 
         public override ArcFile TryOpen (ArcView file)
         {
-            if (!file.View.AsciiEqual (4, "ARCHIVED"))
+            if (!file.View.AsciiEqual (4, "ARCHIVED") && !file.View.AsciiEqual(4, "ENGLISH "))
                 return null;
             int count = file.View.ReadInt16 (0x0C);
             if (!IsSaneCount (count))
diff --git a/ArcFormats/Seraphim/ImageSeraph.cs b/ArcFormats/Seraphim/ImageSeraph.cs
index 9aabea24..2d8625d8 100644
--- a/ArcFormats/Seraphim/ImageSeraph.cs
+++ b/ArcFormats/Seraphim/ImageSeraph.cs
@@ -54,7 +54,8 @@ namespace GameRes.Formats.Seraphim
         public override ImageMetaData ReadMetaData (IBinaryStream stream)
         {
             var header = stream.ReadHeader (0x10);
-            if ('C' != header[0] || 'F' != header[1] || 0 != header[3])
+            uint sig = header.ToUInt16(0);
+            if (sig != Signature)
                 return null;
             int packed_size = header.ToInt32 (12);
             if (packed_size <= 0 || packed_size > stream.Length-0x10)