diff --git a/src/app/components/calculator-results/calculator-results.component.ts b/src/app/components/calculator-results/calculator-results.component.ts
index a586149bb674a971f8adb00606e07e6ab9b73c50..487760c02a245897e2c29e6fafaecd195dba30e6 100644
--- a/src/app/components/calculator-results/calculator-results.component.ts
+++ b/src/app/components/calculator-results/calculator-results.component.ts
@@ -126,7 +126,12 @@ export class CalculatorResultsComponent {
     }
 
     private paramLabel(p: NgParameter): string {
-        return p.symbol + ": " + p.label + " (" + p.unit + ")";
+        let res = p.symbol;
+        if (p.label != undefined && p.label != "")
+            res += ": " + p.label;
+        if (p.unit != undefined && p.unit != "")
+            res += " (" + p.unit + ")";
+        return res;
     }
 
     // public show() {