diff --git a/source/coral/files.cpp b/source/coral/files.cpp
index 141a970..a168f07 100644
--- a/source/coral/files.cpp
+++ b/source/coral/files.cpp
@@ -107,12 +107,16 @@ export namespace coral {
 	};
 
 	struct file_reader : public reader {
+		virtual ~file_reader() {}
+
 		virtual expected<u64, io_error> seek(u64 offset) = 0;
 
 		virtual expected<u64, io_error> tell() = 0;
 	};
 
-	struct file_writer : public writer {};
+	struct file_writer : public writer {
+		virtual ~file_reader() {}
+	};
 
 	/**
 	 * Platform-generalized file system interface.