diff --git a/common/rfb/RawEncoder.cxx b/common/rfb/RawEncoder.cxx
index a2545b6..5612cb8 100644
--- a/common/rfb/RawEncoder.cxx
+++ b/common/rfb/RawEncoder.cxx
@@ -36,7 +36,7 @@
 {
 }
 
-bool RawEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+bool RawEncoder::writeRect(const Rect& r, TransImageGetter* ig, Rect* actual)
 {
   int x = r.tl.x;
   int y = r.tl.y;