diff --git a/src/repl.py b/src/repl.py
index cbc581c..3185b89 100644
--- a/src/repl.py
+++ b/src/repl.py
@@ -96,7 +96,8 @@ class REPL:
                     stmt: ExpressionStmt = program[0]  # type: ignore
                     try:
                         value = self.interpreter.evaluate(stmt.expression)
-                        print(self.interpreter.stringify(value))
+                        if value is not None:
+                            print(self.interpreter.stringify(value))
                     except PebbleRuntimeError as e:
                         Pebble.runtime_error(e)
                 else: