diff --git a/hw/xquartz/mach-startup/Makefile.am b/hw/xquartz/mach-startup/Makefile.am
index 62f85f16a..e250b2869 100644
--- a/hw/xquartz/mach-startup/Makefile.am
+++ b/hw/xquartz/mach-startup/Makefile.am
@@ -15,13 +15,6 @@ dist_X11_bin_SOURCES = \
 dist_X11_SOURCES = \
 	bundle_trampoline.c
 
-# strndup(3) was added in Mac OS X 10.7, but we do this unconditionally to deal
-# with the case where we build on Lion but target Snow Leopard as the minimum
-# OS version.
-#if NEED_STRNDUP
-dist_X11_bin_SOURCES += $(top_srcdir)/os/strndup.c
-#endif
-
 nodist_X11_bin_SOURCES = \
 	mach_startupServer.c \
 	mach_startupUser.c
diff --git a/hw/xquartz/mach-startup/meson.build b/hw/xquartz/mach-startup/meson.build
index 1d5318441..a1c782b1f 100644
--- a/hw/xquartz/mach-startup/meson.build
+++ b/hw/xquartz/mach-startup/meson.build
@@ -58,10 +58,6 @@ endif
 x11_bin = executable('X11.bin',
      [
       'bundle-main.c',
-      # strndup(3) was added in Mac OS X 10.7 (Lion), but we do this
-      # unconditionally to deal with the case where we build on 10.7 or later,
-      # but target 10.6 (Snow Leopard) or earlier as the minimum OS version.
-      '../../../os/strndup.c',
       mach_startup[1], # mach_startupServer.c
       mach_startup[3], # mach_startupUser.c
      ],