diff --git a/public/app/features/correlations/transformations.ts b/public/app/features/correlations/transformations.ts
index 11320ad8a10..b98163c07ed 100644
--- a/public/app/features/correlations/transformations.ts
+++ b/public/app/features/correlations/transformations.ts
@@ -22,7 +22,7 @@ export const getTransformationVars = (
         transformVal[transformation.mapValue || fieldName] = match[1] || match[0];
       }
     }
-  } else if (transformation.type === SupportedTransformationType.Logfmt) {
+  } else if (transformation.type === SupportedTransformationType.Logfmt && fieldValue !== undefined) {
     transformVal = logfmt.parse(fieldValue);
   }