Index: Ringtoets/Common/src/Ringtoets.Common.Forms/TypeConverters/NoProbabilityValueDoubleConverter.cs
===================================================================
diff -u -rbec135dd51ffb5a9beb8cc848d7f38731c5fe5e0 -r68428832c744c0a4a55a51fd81d4e96001060b54
--- Ringtoets/Common/src/Ringtoets.Common.Forms/TypeConverters/NoProbabilityValueDoubleConverter.cs	(.../NoProbabilityValueDoubleConverter.cs)	(revision bec135dd51ffb5a9beb8cc848d7f38731c5fe5e0)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/TypeConverters/NoProbabilityValueDoubleConverter.cs	(.../NoProbabilityValueDoubleConverter.cs)	(revision 68428832c744c0a4a55a51fd81d4e96001060b54)
@@ -73,17 +73,14 @@
 
                 try
                 {
-                    if (text.StartsWith(returnPeriodNotation))
+                    if (!text.StartsWith(returnPeriodNotation))
                     {
-                        string returnPeriodValue = text.Substring(2).ToLower();
-                        if (returnPeriodValue == CommonBaseResources.RoundedDouble_ToString_PositiveInfinity.ToLower())
-                        {
-                            return 0.0;
-                        }
-                        return 1 / Convert.ToDouble(returnPeriodValue);
+                        return Convert.ToDouble(text);
                     }
-
-                    return Convert.ToDouble(text);
+                    string returnPeriodValue = text.Substring(2).ToLower();
+                    return returnPeriodValue != CommonBaseResources.RoundedDouble_ToString_PositiveInfinity.ToLower()
+                               ? 1 / Convert.ToDouble(returnPeriodValue)
+                               : 0.0;
                 }
                 catch (FormatException exception)
                 {