diff --git a/src/servers/package/FSUtils.cpp b/src/servers/package/FSUtils.cpp
index 3c2cd9dbb1..1ac49b894e 100644
--- a/src/servers/package/FSUtils.cpp
+++ b/src/servers/package/FSUtils.cpp
@@ -37,8 +37,8 @@ FSUtils::ShellEscapeString(const BString& string)
 
 
 /*static*/ status_t
-FSUtils::OpenSubDirectory(BDirectory& baseDirectory, const RelativePath& path,
-	bool create, BDirectory& _directory)
+FSUtils::OpenSubDirectory(const BDirectory& baseDirectory,
+	const RelativePath& path, bool create, BDirectory& _directory)
 {
 	// get a string for the path
 	BString pathString = path.ToString();
diff --git a/src/servers/package/FSUtils.h b/src/servers/package/FSUtils.h
index b1c1c3868c..0a1f0c4cab 100644
--- a/src/servers/package/FSUtils.h
+++ b/src/servers/package/FSUtils.h
@@ -197,7 +197,8 @@ public:
 	static	BString				ShellEscapeString(const BString& string);
 									// throw std::bad_alloc
 
-	static	status_t			OpenSubDirectory(BDirectory& baseDirectory,
+	static	status_t			OpenSubDirectory(
+									const BDirectory& baseDirectory,
 									const RelativePath& path, bool create,
 									BDirectory& _directory);