diff --git a/meson.build b/meson.build
index d26690ce20..c26c417de1 100644
--- a/meson.build
+++ b/meson.build
@@ -1399,7 +1399,7 @@ iconv = not_found
 curses = not_found
 if have_system and get_option('curses').allowed()
   curses_test = '''
-    #if defined(__APPLE__) || defined(__OpenBSD__)
+    #ifdef __APPLE__
     #define _XOPEN_SOURCE_EXTENDED 1
     #endif
     #include <locale.h>
diff --git a/ui/curses.c b/ui/curses.c
index ec61615f7c..4d0be9b37d 100644
--- a/ui/curses.c
+++ b/ui/curses.c
@@ -38,7 +38,7 @@
 #include "ui/input.h"
 #include "sysemu/sysemu.h"
 
-#if defined(__APPLE__) || defined(__OpenBSD__)
+#ifdef __APPLE__
 #define _XOPEN_SOURCE_EXTENDED 1
 #endif