diff --git a/audio/libsidplay/patches/patch-src_smart_h b/audio/libsidplay/patches/patch-src_smart_h
new file mode 100644
index 00000000000..841ee7934f0
--- /dev/null
+++ b/audio/libsidplay/patches/patch-src_smart_h
@@ -0,0 +1,27 @@
+$OpenBSD: patch-src_smart_h,v 1.1 2010/05/11 21:19:25 espie Exp $
+--- src/smart.h.orig	Tue May 11 23:07:35 2010
++++ src/smart.h	Tue May 11 23:16:56 2010
+@@ -211,16 +211,16 @@ class smartPtr : public smartPtrBase<T>
+     {
+         if ( bufferLen >= 1 )
+         {
+-            pBufCurrent = ( bufBegin = buffer );
+-            bufEnd = bufBegin + bufferLen;
+-            bufLen = bufferLen;
+-            status = true;
++            this->pBufCurrent = ( this->bufBegin = buffer );
++            this->bufEnd = this->bufBegin + bufferLen;
++            this->bufLen = bufferLen;
++            this->status = true;
+         }
+         else
+         {
+-            pBufCurrent = bufBegin = bufEnd = 0;
+-            bufLen = 0;
+-            status = false;
++            this->pBufCurrent = this->bufBegin = this->bufEnd = 0;
++            this->bufLen = 0;
++            this->status = false;
+         }
+     }
+ };