diff --git a/lib/mixins/property-accessors.html b/lib/mixins/property-accessors.html
index 15900ab7bc..e518656fdd 100644
--- a/lib/mixins/property-accessors.html
+++ b/lib/mixins/property-accessors.html
@@ -362,6 +362,7 @@
               outValue = JSON.parse(/** @type {string} */(value));
             } catch(x) {
               // allow non-JSON literals like Strings and Numbers
+              outValue = value;
             }
             break;