diff --git a/var/spack/repos/builtin/packages/tut/package.py b/var/spack/repos/builtin/packages/tut/package.py
index c0d2bbcc8f..02773c8ffa 100644
--- a/var/spack/repos/builtin/packages/tut/package.py
+++ b/var/spack/repos/builtin/packages/tut/package.py
@@ -33,6 +33,8 @@ class Tut(WafPackage):
 
     version('2016-12-19', '8b1967fa295ae1ce4d4431c2f811e521')
 
+    patch('python3-octal.patch', when='@2016-12-19')
+
     def build_args(self):
         args = []
 
diff --git a/var/spack/repos/builtin/packages/tut/python3-octal.patch b/var/spack/repos/builtin/packages/tut/python3-octal.patch
new file mode 100644
index 0000000000..d6d9b14273
--- /dev/null
+++ b/var/spack/repos/builtin/packages/tut/python3-octal.patch
@@ -0,0 +1,11 @@
+--- a/waftools/gcov.py	2016-12-19 04:55:44.000000000 -0600
++++ b/waftools/gcov.py	2018-03-28 10:42:53.000000000 -0500
+@@ -13,7 +13,7 @@
+     wrapper = NamedTemporaryFile(delete=False)
+     wrapper.write(script)
+     wrapper.close()
+-    os.chmod(wrapper.name, 0777)
++    os.chmod(wrapper.name, 0o777)
+ 
+     yield wrapper.name
+