diff --git a/common/rfb/SMsgHandler.cxx b/common/rfb/SMsgHandler.cxx
index d4046b1..388b21f 100644
--- a/common/rfb/SMsgHandler.cxx
+++ b/common/rfb/SMsgHandler.cxx
@@ -39,7 +39,7 @@
   cp.setPF(pf);
 }
 
-void SMsgHandler::setEncodings(int nEncodings, rdr::S32* encodings)
+void SMsgHandler::setEncodings(int nEncodings, const rdr::S32* encodings)
 {
   bool firstFence, firstContinuousUpdates;