diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index c88de21..ce23298 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -703,7 +703,7 @@
   static char* buffer = NULL;
   if (buffer != NULL) free(buffer);
   buffer = new char[length()+1];
-  WriteToFlat(this, buffer, 0, length());
+  WriteToFlat(this, reinterpret_cast<uint8_t*>(buffer), 0, length());
   buffer[length()] = 0;
   return buffer;
 }