diff --git a/win/rfb_win32/DynamicFn.cxx b/win/rfb_win32/DynamicFn.cxx
index e933f24..b71ea7b 100644
--- a/win/rfb_win32/DynamicFn.cxx
+++ b/win/rfb_win32/DynamicFn.cxx
@@ -32,7 +32,7 @@
     vlog.info("DLL %s not found (%d)", (const char*)CStr(dllName), GetLastError());
     return;
   }
-  fnPtr = GetProcAddress(dllHandle, fnName);
+  fnPtr = (void*) GetProcAddress(dllHandle, fnName);
   if (!fnPtr)
     vlog.info("proc %s not found in %s (%d)", fnName, (const char*)CStr(dllName), GetLastError());
 }