diff --git a/src/dlg/dlgwrap.c b/src/dlg/dlgwrap.c
index 639411543..5b2006c12 100644
--- a/src/dlg/dlgwrap.c
+++ b/src/dlg/dlgwrap.c
@@ -18,7 +18,7 @@
 
   /* We have to duplicate these feature test macros from `dlg.c` */
   /* since `freetype.h` loads some affected standard headers.    */
-#define _XOPEN_SOURCE
+#define _XOPEN_SOURCE 600
 #define _POSIX_C_SOURCE 200809L
 
 #include <freetype/freetype.h>
diff --git a/subprojects/dlg b/subprojects/dlg
index 0cc0d3eae..d142e646e 160000
--- a/subprojects/dlg
+++ b/subprojects/dlg
@@ -1 +1 @@
-Subproject commit 0cc0d3eaed28483fc8036d90ac18878ebd83ed87
+Subproject commit d142e646e263c89f93663e027c2f0d03739ab42d