diff --git a/SabreTools.Serialization/Deserializers/SFB.cs b/SabreTools.Serialization/Deserializers/SFB.cs
index f7fd15d5..5d2026e2 100644
--- a/SabreTools.Serialization/Deserializers/SFB.cs
+++ b/SabreTools.Serialization/Deserializers/SFB.cs
@@ -25,7 +25,7 @@ namespace SabreTools.Serialization.Deserializers
             if (sfb == null)
                 return null;
 
-            string magic = Encoding.ASCII.GetString(sfb.Magic);
+            string magic = Encoding.ASCII.GetString(sfb!.Magic!);
             if (magic != ".SFB")
                 return null;
 
diff --git a/SabreTools.Serialization/Deserializers/SFO.cs b/SabreTools.Serialization/Deserializers/SFO.cs
index 6883bef4..b09b992e 100644
--- a/SabreTools.Serialization/Deserializers/SFO.cs
+++ b/SabreTools.Serialization/Deserializers/SFO.cs
@@ -71,7 +71,7 @@ namespace SabreTools.Serialization.Deserializers
             if (sfoHeader == null)
                 return null;
 
-            string magic = Encoding.ASCII.GetString(sfoHeader.Magic);
+            string magic = Encoding.ASCII.GetString(sfoHeader!.Magic!);
             if (magic != "\0PSF")
                 return null;