diff --git a/os/io.c b/os/io.c
index 5c57c7429..476435c3d 100644
--- a/os/io.c
+++ b/os/io.c
@@ -948,7 +948,7 @@ FlushClient(ClientPtr who, OsCommPtr oc)
 #ifdef EMSGSIZE                 /* check for another brain-damaged OS bug */
         else if (errno == EMSGSIZE) {
             /* making separate try with half of the size */
-            todo >>= 1;
+            todo /= 2;
         }
 #endif
         else {