diff --git a/taglib/toolkit/tiostream.cpp b/taglib/toolkit/tiostream.cpp
index f76fe095..e7b60dd7 100644
--- a/taglib/toolkit/tiostream.cpp
+++ b/taglib/toolkit/tiostream.cpp
@@ -38,3 +38,8 @@ IOStream::IOStream()
 IOStream::~IOStream()
 {
 }
+
+void IOStream::clear()
+{
+}
+
diff --git a/taglib/toolkit/tiostream.h b/taglib/toolkit/tiostream.h
index 8d7ba105..3e7de22a 100644
--- a/taglib/toolkit/tiostream.h
+++ b/taglib/toolkit/tiostream.h
@@ -133,7 +133,7 @@ namespace TagLib {
     /*!
      * Reset the end-of-stream and error flags on the stream.
      */
-    virtual void clear() = 0;
+    virtual void clear();
 
     /*!
      * Returns the current offset within the stream.