diff --git a/Deps/Source/Google.Protobuf/JsonParser.cs b/Deps/Source/Google.Protobuf/JsonParser.cs
index 32aac0e3e..6b6f2d9ae 100644
--- a/Deps/Source/Google.Protobuf/JsonParser.cs
+++ b/Deps/Source/Google.Protobuf/JsonParser.cs
@@ -884,8 +884,8 @@ namespace Google.Protobuf
                 if (subseconds != "")
                 {
                     // This should always work, as we've got 1-9 digits.
-                    if (int.TryParse(subseconds.Substring(1), out int parsedFraction))
-                        nanos = parsedFraction * SubsecondScalingFactors[subseconds.Length] * multiplier;
+                    int parsedFraction = int.Parse(subseconds.Substring(1));
+                    nanos = parsedFraction * SubsecondScalingFactors[subseconds.Length] * multiplier;
                 }
                 if (!Duration.IsNormalized(seconds, nanos))
                 {