diff --git a/stepmania/src/RageFileManager.cpp b/stepmania/src/RageFileManager.cpp
index e07a7540bf..b4d6d65493 100644
--- a/stepmania/src/RageFileManager.cpp
+++ b/stepmania/src/RageFileManager.cpp
@@ -910,7 +910,7 @@ bool IsADirectory( const RString &sPath )
 	return FILEMAN->IsADirectory( sPath );
 }
 
-unsigned GetFileSizeInBytes( const RString &sPath )
+int GetFileSizeInBytes( const RString &sPath )
 {
 	return FILEMAN->GetFileSizeInBytes( sPath );
 }
diff --git a/stepmania/src/RageUtil.h b/stepmania/src/RageUtil.h
index 435e9c8502..a5e115c4a9 100644
--- a/stepmania/src/RageUtil.h
+++ b/stepmania/src/RageUtil.h
@@ -584,7 +584,7 @@ bool DeleteRecursive( RageFileDriver *prfd, const RString &sDir );	/* delete the
 bool DoesFileExist( const RString &sPath );
 bool IsAFile( const RString &sPath );
 bool IsADirectory( const RString &sPath );
-unsigned GetFileSizeInBytes( const RString &sFilePath );
+int GetFileSizeInBytes( const RString &sFilePath );
 
 // call FixSlashesInPlace on any path that came from the user
 void FixSlashesInPlace( RString &sPath );