diff --git a/dlls/kernel32/tests/pipe.c b/dlls/kernel32/tests/pipe.c
index 2d45702b66c..e6a57bf0821 100644
--- a/dlls/kernel32/tests/pipe.c
+++ b/dlls/kernel32/tests/pipe.c
@@ -796,7 +796,7 @@ static void test_CreatePipe(void)
     size = 32768;
     buffer = HeapAlloc( GetProcessHeap(), 0, size );
     for (i = 0; i < size; i++) buffer[i] = i;
-    ok(CreatePipe(&piperead, &pipewrite, &pipe_attr, size) != 0, "CreatePipe failed\n");
+    ok(CreatePipe(&piperead, &pipewrite, &pipe_attr, (size + 24)) != 0, "CreatePipe failed\n");
     ok(WriteFile(pipewrite, buffer, size, &written, NULL), "Write to anonymous pipe failed\n");
     ok(written == size, "Write to anonymous pipe wrote %d bytes\n", written);
     /* and close the write end, read should still succeed*/