diff --git a/Editor/Inspector/Parameters/DefaultValueField.cs b/Editor/Inspector/Parameters/DefaultValueField.cs
index 7e7e8fe5..6ba6cd22 100644
--- a/Editor/Inspector/Parameters/DefaultValueField.cs
+++ b/Editor/Inspector/Parameters/DefaultValueField.cs
@@ -74,7 +74,9 @@ namespace nadena.dev.modular_avatar.core.editor
                 _defaultValueField.value = 0;
                 _hasExplicitDefaultValueField.value = false;
             }
-            else if (float.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out var parsed))
+            else if (float.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out var parsed)
+                && !float.IsNaN(parsed)
+                && !float.IsInfinity(parsed))
             {
                 _defaultValueField.value = _syncType switch
                 {