diff --git a/common/rfb/ZRLEEncoder.cxx b/common/rfb/ZRLEEncoder.cxx
index ef0dd9f..a83d79f 100644
--- a/common/rfb/ZRLEEncoder.cxx
+++ b/common/rfb/ZRLEEncoder.cxx
@@ -69,7 +69,7 @@
     delete mos;
 }
 
-bool ZRLEEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+bool ZRLEEncoder::writeRect(const Rect& r, TransImageGetter* ig, Rect* actual)
 {
   rdr::U8* imageBuf = writer->getImageBuf(64 * 64 * 4 + 4);
   mos->clear();