diff --git a/testsuite/all_sourcecode.tests b/testsuite/all_sourcecode.tests
index e71301b06..352a1391b 100755
--- a/testsuite/all_sourcecode.tests
+++ b/testsuite/all_sourcecode.tests
@@ -68,7 +68,7 @@ rm -f src.obsolete.funcs
 # don't allow obsolete headers
 #
 find $srcdir/.. '(' -name '*.c' -o -name '*.h' ')' -print0 | xargs -0 \
-	grep -E -e '\<(malloc|memory)\.h\>' \
+	grep -E -e '\<(malloc|memory|sys/(errno|fcntl|signal|stropts|termios|unistd))\.h\>' \
 	| sed -e "s:^$srcdir/\.\./::g" > src.obsolete.headers
 testing "Obsolete headers" "cat src.obsolete.headers" "" "" ""
 rm -f src.obsolete.headers