diff --git a/liblangtag/liblangtag-0.4.0-windows.patch b/liblangtag/liblangtag-0.4.0-windows.patch
index 1f07bd0e03035ed39e802c516a8fc4f6ad752524..270f280c05053730895dbd9626d183860a2def59 100644
--- a/liblangtag/liblangtag-0.4.0-windows.patch
+++ b/liblangtag/liblangtag-0.4.0-windows.patch
@@ -74,7 +74,7 @@
 +{
 +       lt_return_val_if_fail (v != NULL, FALSE);
 +
-+       return 1 == InterlockedExchangeAdd((LONG*)v, -1) - 1;
++       return 0 == (InterlockedExchangeAdd((LONG*)v, -1) - 1);
 +}
 +
 +