diff --git a/src/util.rs b/src/util.rs
index 37f17e10..b4f09e30 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -28,10 +28,24 @@ impl Case {
                 Cow::Borrowed(s) if s.is_constant_case() => cow,
                 _ => cow.to_constant_case().into(),
             },
-            Self::Pascal => match cow {
-                Cow::Borrowed(s) if s.is_pascal_case() => cow,
-                _ => cow.to_pascal_case().into(),
-            },
+            Self::Pascal => {
+                if let Some((first, _)) = cow
+                    .char_indices()
+                    .find(|(_, c)| c != &'_' && !c.is_ascii_digit())
+                {
+                    if first != 0 {
+                        let (prefix, s) = cow.split_at(first);
+                        format!("{prefix}{}", s.to_pascal_case()).into()
+                    } else {
+                        match cow {
+                            Cow::Borrowed(s) if s.is_pascal_case() => cow,
+                            _ => cow.to_pascal_case().into(),
+                        }
+                    }
+                } else {
+                    cow
+                }
+            }
             Self::Snake => match cow {
                 Cow::Borrowed(s) if s.is_snake_case() => cow,
                 _ => cow.to_snake_case().into(),