diff --git a/stepmania/src/SongCacheIndex.cpp b/stepmania/src/SongCacheIndex.cpp
index 162a4ba146..cbc3154bf0 100644
--- a/stepmania/src/SongCacheIndex.cpp
+++ b/stepmania/src/SongCacheIndex.cpp
@@ -39,16 +39,16 @@ void SongCacheIndex::ReadCacheIndex()
 	CacheIndex.Reset();
 }
 
-void SongCacheIndex::AddCacheIndex(const CString &path, int hash)
+void SongCacheIndex::AddCacheIndex(const CString &path, unsigned hash)
 {
 	CacheIndex.SetValueI( "Cache", "CacheVersion", FILE_CACHE_VERSION );
-	CacheIndex.SetValueI( "Cache", path, hash );
+	CacheIndex.SetValueU( "Cache", path, hash );
 	CacheIndex.WriteFile();
 }
 
-int SongCacheIndex::GetCacheHash( const CString &path )
+unsigned SongCacheIndex::GetCacheHash( const CString &path ) const
 {
-	int iDirHash;
-	CacheIndex.GetValueI( "Cache", path, iDirHash );
+	unsigned iDirHash;
+	CacheIndex.GetValueU( "Cache", path, iDirHash );
 	return iDirHash;
 }
diff --git a/stepmania/src/SongCacheIndex.h b/stepmania/src/SongCacheIndex.h
index 445765ab8c..d05902002d 100644
--- a/stepmania/src/SongCacheIndex.h
+++ b/stepmania/src/SongCacheIndex.h
@@ -10,8 +10,8 @@ public:
 	~SongCacheIndex();
 
 	void ReadCacheIndex();
-	void AddCacheIndex( const CString &path, int hash );
-	int GetCacheHash( const CString &path );
+	void AddCacheIndex( const CString &path, unsigned hash );
+	unsigned GetCacheHash( const CString &path ) const;
 };
 
 extern SongCacheIndex *SONGINDEX;	// global and accessable from anywhere in our program