diff --git a/src/tests/add-ons/kernel/file_systems/fs_shell/FSShellRules b/src/tests/add-ons/kernel/file_systems/fs_shell/FSShellRules
new file mode 100644
index 0000000000..7ce8dec227
--- /dev/null
+++ b/src/tests/add-ons/kernel/file_systems/fs_shell/FSShellRules
@@ -0,0 +1,22 @@
+# Same as SetupIncludes, but doesn't include the posix headers.
+rule SetupFSShellIncludes
+{
+	# XXX add "opengl" later
+	local os_includes = add-ons add-ons/file_system add-ons/graphics add-ons/input_server
+		add-ons/screen_saver add-ons/tracker app device drivers game interface kernel media mail
+		midi midi2 net storage support translation ;
+
+	# Overwrite any exiting content when changing HDRS. This rule may be invoked multiple times.
+
+	# Use headers directory, to allow to do things like include <posix/string.h>
+	HDRS = [ FDirName $(OBOS_TOP) headers ] ;
+
+	# Use public OS header directories
+	HDRS += [ PublicHeaders $(os_includes) ] ;
+
+	# Use the root of the private headers -- not so nice, but simplifies things.
+	HDRS += [ PrivateHeaders $(DOT) ] ;
+
+	# The platform dependent headers.
+	HDRS += $(PLATFORM_HEADERS) ;
+}