diff --git a/src/ox/fs/filestore.hpp b/src/ox/fs/filestore.hpp
index 63093c0dc..6f3dbe39b 100644
--- a/src/ox/fs/filestore.hpp
+++ b/src/ox/fs/filestore.hpp
@@ -12,10 +12,11 @@
 namespace ox {
 namespace fs {
 
-template<typename FsT>
+template<typename FsT, typename InodeId>
 struct FileStoreHeader {
+	typedef InodeId InodeId_t;
 	typedef FsT FsSize_t;
-	const static auto VERSION = 2;
+	const static auto VERSION = 4;
 
 	uint16_t version;
 	uint16_t fsType;
@@ -28,7 +29,7 @@ template<typename Header>
 class FileStore {
 
 	public:
-		typedef uint16_t InodeId_t;
+		typedef typename Header::InodeId_t InodeId_t;
 		typedef typename Header::FsSize_t FsSize_t;
 		const static auto VERSION = Header::VERSION;
 
@@ -597,9 +598,9 @@ uint8_t *FileStore<Header>::format(uint8_t *buffer, typename Header::FsSize_t si
 	return (uint8_t*) buffer;
 }
 
-typedef FileStore<FileStoreHeader<uint16_t>> FileStore16;
-typedef FileStore<FileStoreHeader<uint32_t>> FileStore32;
-typedef FileStore<FileStoreHeader<uint64_t>> FileStore64;
+typedef FileStore<FileStoreHeader<uint16_t, uint16_t>> FileStore16;
+typedef FileStore<FileStoreHeader<uint32_t, uint16_t>> FileStore32;
+typedef FileStore<FileStoreHeader<uint64_t, uint16_t>> FileStore64;
 
 }
 }
diff --git a/src/ox/fs/filesystem.cpp b/src/ox/fs/filesystem.cpp
index 23040f868..b4a3a758a 100644
--- a/src/ox/fs/filesystem.cpp
+++ b/src/ox/fs/filesystem.cpp
@@ -11,19 +11,26 @@ namespace ox {
 namespace fs {
 
 FileSystem *createFileSystem(void *buff) {
+	auto version = ((FileStore16*) buff)->version();
 	auto type = ((FileStore16*) buff)->fsType();
 	FileSystem *fs = nullptr;
 
-	switch (type) {
-		case ox::fs::OxFS_16:
-			fs = new FileSystem16(buff);
-			break;
-		case ox::fs::OxFS_32:
-			fs = new FileSystem32(buff);
-			break;
-		case ox::fs::OxFS_64:
-			fs = new FileSystem64(buff);
+	switch (version) {
+		case 4:
+			switch (type) {
+				case ox::fs::OxFS_16:
+					fs = new FileSystem16(buff);
+					break;
+				case ox::fs::OxFS_32:
+					fs = new FileSystem32(buff);
+					break;
+				case ox::fs::OxFS_64:
+					fs = new FileSystem64(buff);
+					break;
+			}
 			break;
+		default:
+			return nullptr;
 	}
 
 	return fs;
diff --git a/src/ox/fs/oxfstool.cpp b/src/ox/fs/oxfstool.cpp
index 972efa39e..ee9ee5295 100644
--- a/src/ox/fs/oxfstool.cpp
+++ b/src/ox/fs/oxfstool.cpp
@@ -236,7 +236,7 @@ int write(int argc, char **args, bool expand) {
 					free(srcBuff);
 				} else {
 					err = 1;
-					fprintf(stderr, "Could not load source file.\n");
+					fprintf(stderr, "Could not load source file: %s.\n", srcPath);
 				}
 			}