diff --git a/common/rfb/RREEncoder.cxx b/common/rfb/RREEncoder.cxx
index b000e9d..1b86986 100644
--- a/common/rfb/RREEncoder.cxx
+++ b/common/rfb/RREEncoder.cxx
@@ -46,7 +46,7 @@
 {
 }
 
-bool RREEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+bool RREEncoder::writeRect(const Rect& r, TransImageGetter* ig, Rect* actual)
 {
   int w = r.width();
   int h = r.height();