diff --git a/gio/tests/Makefile.am b/gio/tests/Makefile.am
index 5817d182f..3e873bb65 100644
--- a/gio/tests/Makefile.am
+++ b/gio/tests/Makefile.am
@@ -557,6 +557,8 @@ giotypefuncs.c: Makefile
 CLEANFILES += xgen-giosrc.c xgen-gio giotypefuncs.c
 
 if ENABLE_INSTALLED_TESTS
+if OS_UNIX
 install-data-hook:
 	$(AM_V_at) chmod a+x $(DESTDIR)$(installed_testdir)/x-content/win32-software/autorun.exe
 endif
+endif