diff --git a/lib/sdk/src/filetype/package.rs b/lib/sdk/src/filetype/package.rs
index fc2e8f6..338cc8e 100644
--- a/lib/sdk/src/filetype/package.rs
+++ b/lib/sdk/src/filetype/package.rs
@@ -97,6 +97,7 @@ pub struct Package {
     _name: String,
     _root: PathBuf,
     inner: PackageType,
+    flags: u8,
 }
 
 impl Deref for Package {
@@ -119,6 +120,7 @@ impl Package {
             _name: name,
             _root: root,
             inner: Default::default(),
+            flags: 1,
         }
     }
 
@@ -179,6 +181,7 @@ impl Package {
             inner,
             _name: name,
             _root: root.to_path_buf(),
+            flags: 1,
         };
 
         Ok(pkg)
@@ -225,10 +228,19 @@ impl Package {
                 .insert(PathBuf::from(path.display().to_string()));
         }
 
+        let flags = r.read_u8()?;
+
+        if cfg!(debug_assertions) && flags != 1 {
+            tracing::warn!("Unexpected value for package flags: {:0x}", flags);
+        } else if (flags & 0xFE) >= 2 {
+            tracing::warn!("Resource Package has common packages. Ignoring.");
+        }
+
         let pkg = Self {
             inner,
             _name: name,
             _root: PathBuf::new(),
+            flags,
         };
 
         Ok(pkg)
@@ -251,6 +263,8 @@ impl Package {
             }
         }
 
+        w.write_u8(self.flags)?;
+
         Ok(w.into_inner())
     }
 }