diff --git a/meta/lib/oe/license.py b/meta/lib/oe/license.py
index 6f882c3812..6ff7688d22 100644
--- a/meta/lib/oe/license.py
+++ b/meta/lib/oe/license.py
@@ -173,8 +173,8 @@ class ManifestVisitor(LicenseVisitor):
         LicenseVisitor.__init__(self)
 
     def visit(self, node):
-        if isinstance(node, ast.Str):
-            lic = node.s
+        if isinstance(node, ast.Constant):
+            lic = node.value
 
             if license_ok(self._canonical_license(self._d, lic),
                     self._dont_want_licenses) == True: