diff --git a/Makefile b/Makefile
index 229181372522d..0dd15eb9fb472 100644
--- a/Makefile
+++ b/Makefile
@@ -597,8 +597,9 @@ ifeq ($(NATIVE), osx)
     endif
   endif
   ifeq ($(LOCALIZE), 1)
-    ifeq ($(MACPORTS), 1)
-      ifneq ($(TILES), 1)
+    ifneq ($(TILES), 1)
+      CXXFLAGS += -D_XOPEN_SOURCE_EXTENDED
+      ifeq ($(MACPORTS), 1)
         CXXFLAGS += -I$(shell ncursesw6-config --includedir)
         LDFLAGS += -L$(shell ncursesw6-config --libdir)
       endif