diff --git a/common/rdr/InStream.h b/common/rdr/InStream.h
index 760fb3d..212a2ec 100644
--- a/common/rdr/InStream.h
+++ b/common/rdr/InStream.h
@@ -92,7 +92,7 @@
 
     // readBytes() reads an exact number of bytes.
 
-    virtual void readBytes(void* data, int length) {
+    void readBytes(void* data, int length) {
       U8* dataPtr = (U8*)data;
       U8* dataEnd = dataPtr + length;
       while (dataPtr < dataEnd) {