diff --git a/common/rfb/ZRLEEncoder.cxx b/common/rfb/ZRLEEncoder.cxx
index df7cfbd..840af6b 100644
--- a/common/rfb/ZRLEEncoder.cxx
+++ b/common/rfb/ZRLEEncoder.cxx
@@ -28,6 +28,21 @@
 
 IntParameter zlibLevel("ZlibLevel","Zlib compression level",-1);
 
+static inline void writeOpaque24A(rdr::OutStream* os, rdr::U32 u)
+{
+  os->check(3);
+  os->writeU8(((rdr::U8*)&u)[0]);
+  os->writeU8(((rdr::U8*)&u)[1]);
+  os->writeU8(((rdr::U8*)&u)[2]);
+}
+static inline void writeOpaque24B(rdr::OutStream* os, rdr::U32 u)
+{
+  os->check(3);
+  os->writeU8(((rdr::U8*)&u)[1]);
+  os->writeU8(((rdr::U8*)&u)[2]);
+  os->writeU8(((rdr::U8*)&u)[3]);
+}
+
 #define EXTRA_ARGS ImageGetter* ig
 #define GET_IMAGE_INTO_BUF(r,buf) ig->getImage(buf, r);
 #define BPP 8