diff --git a/include/sqstdio.h b/include/sqstdio.h
index d19ec2e..fbc7451 100644
--- a/include/sqstdio.h
+++ b/include/sqstdio.h
@@ -7,6 +7,7 @@
 #define SQSTD_STREAM_TYPE_TAG 0x80000000
 
 struct SQStream {
+    virtual ~SQStream() {}
     virtual SQInteger Read(void *buffer, SQInteger size) = 0;
     virtual SQInteger Write(void *buffer, SQInteger size) = 0;
     virtual SQInteger Flush() = 0;