diff --git a/include/gettext.h b/include/gettext.h
index 27f079617..ac2663c4c 100644
--- a/include/gettext.h
+++ b/include/gettext.h
@@ -21,7 +21,7 @@
  * Solaris locale.h includes libintl.h which causes problems when we
  * redefine the gettext functions.  We include it first to avoid this.
  */
-#if defined(HAVE_LOCALE_H) && defined(__sun__) && defined(__svr4__)
+#if defined(HAVE_SETLOCALE) && defined(__sun__) && defined(__svr4__)
 # include <locale.h>
 #endif