--- a/gettext-tools/gnulib-lib/stpncpy.c
+++ b/gettext-tools/gnulib-lib/stpncpy.c
@@ -24,7 +24,7 @@
 /* Specification.  */
 #include <string.h>
 
-#ifndef weak_alias
+#ifndef HAVE_STPNCPY
 # define __stpncpy stpncpy
 #endif