diff --git a/src/deserializer.rs b/src/deserializer.rs
index 4ee1a673..a02682c7 100644
--- a/src/deserializer.rs
+++ b/src/deserializer.rs
@@ -208,7 +208,9 @@ impl<'r> DeRecord<'r> for DeStringRecord<'r> {
         visitor: V,
     ) -> Result<V::Value, DeserializeError> {
         let x = self.next_field()?;
-        if x == "true" {
+        if x.is_empty() {
+            return visitor.visit_none();
+        } else if x == "true" {
             return visitor.visit_bool(true);
         } else if x == "false" {
             return visitor.visit_bool(false);