diff --git a/src/ox/fs/filesystem.hpp b/src/ox/fs/filesystem.hpp
index e31af75e9..8146f92ca 100644
--- a/src/ox/fs/filesystem.hpp
+++ b/src/ox/fs/filesystem.hpp
@@ -106,7 +106,7 @@ class FileSystemTemplate: public FileSystem {
 		FileStore *store = nullptr;
 
 	public:
-		FileSystemTemplate(void *buff);
+		explicit FileSystemTemplate(void *buff);
 
 		int mkdir(const char *path);