diff --git a/bitbake/lib/codegen.py b/bitbake/lib/codegen.py
index 62a6748c47..6955a7ada5 100644
--- a/bitbake/lib/codegen.py
+++ b/bitbake/lib/codegen.py
@@ -401,6 +401,12 @@ class SourceGenerator(NodeVisitor):
     def visit_Num(self, node):
         self.write(repr(node.n))
 
+    def visit_Constant(self, node):
+        # Python 3.8 deprecated visit_Num(), visit_Str(), visit_Bytes(),
+        # visit_NameConstant() and visit_Ellipsis(). They can be removed once we
+        # require 3.8+.
+        self.write(repr(node.value))
+
     def visit_Tuple(self, node):
         self.write('(')
         idx = -1