diff --git a/static/js/data.js b/static/js/data.js
index 361d0385..80159ab6 100644
--- a/static/js/data.js
+++ b/static/js/data.js
@@ -349,7 +349,7 @@ class dataFileBase {
           console.assert(Number.isNaN(ex.T1.valueOf()) | ex.T1 > 50 | ex.isUnsafe == true, "should be unsafe", dat, ex)
         }
         for (const ex of dat.excitations) {
-          console.assert(JSON.stringify(ex.initial)!==JSON.stringify(ex.final),"Final must be different to initial" dat, ex)
+          console.assert(JSON.stringify(ex.initial)!==JSON.stringify(ex.final),"Final must be different to initial", dat, ex)
         }
       }
     }