diff --git a/include/nx/fs.hpp b/include/nx/fs.hpp
index 04deece..e72a77f 100755
--- a/include/nx/fs.hpp
+++ b/include/nx/fs.hpp
@@ -53,7 +53,7 @@ namespace nx::fs
             ~IFile();
 
             void Read(u64 offset, void* buf, size_t size);
-            u64 GetSize();
+            s64 GetSize();
     };
 
     class IDirectory
@@ -72,7 +72,7 @@ namespace nx::fs
 
             ~IDirectory();
 
-            void Read(u64 inval, FsDirectoryEntry* buf, size_t numEntries);
+            void Read(s64 inval, FsDirectoryEntry* buf, size_t numEntries);
             u64 GetEntryCount();
     };
 
diff --git a/source/nx/fs.cpp b/source/nx/fs.cpp
index a7d55ec..c014b6d 100755
--- a/source/nx/fs.cpp
+++ b/source/nx/fs.cpp
@@ -51,9 +51,9 @@ namespace nx::fs
         }
     }
 
-    u64 IFile::GetSize()
+    s64 IFile::GetSize()
     {
-        u64 sizeOut;
+        s64 sizeOut;
         ASSERT_OK(fsFileGetSize(&m_file, &sizeOut), "Failed to get file size");
         return sizeOut;
     }
@@ -71,10 +71,9 @@ namespace nx::fs
         fsDirClose(&m_dir);
     }
 
-    void IDirectory::Read(u64 inval, FsDirectoryEntry* buf, size_t numEntries)
+    void IDirectory::Read(s64 inval, FsDirectoryEntry* buf, size_t numEntries)
     {
-        size_t entriesRead;
-        ASSERT_OK(fsDirRead(&m_dir, inval, &entriesRead, numEntries, buf), "Failed to read directory");
+        ASSERT_OK(fsDirRead(&m_dir, &inval, numEntries, buf), "Failed to read directory");
 
         /*if (entriesRead != numEntries)
         {
@@ -85,7 +84,7 @@ namespace nx::fs
 
     u64 IDirectory::GetEntryCount()
     {
-        u64 entryCount = 0;
+        s64 entryCount = 0;
         ASSERT_OK(fsDirGetEntryCount(&m_dir, &entryCount), "Failed to get entry count");
         return entryCount;
     }