diff --git a/Cargo.lock b/Cargo.lock
index 6d5f477..7a40e30 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -147,7 +147,7 @@ dependencies = [
 
 [[package]]
 name = "fox32asm"
-version = "0.4.0"
+version = "0.4.1"
 dependencies = [
  "anyhow",
  "lazy_static",
diff --git a/src/main.rs b/src/main.rs
index 68f0003..ef84741 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -104,14 +104,5 @@ fn main() -> anyhow::Result<()> {
         .parse()?
         .assemble()?
         .batchpatch_labels()
-        .build_binary(match output_file_name.split_once('.') {
-            Some((_file_name, ext)) => {
-                if ext == "fxf" {
-                    BinaryType::Fxf
-                } else {
-                    BinaryType::Flat
-                }
-            }
-            None => BinaryType::Flat,
-        })
+        .build_binary(if output_file_name.ends_with(".fxf") { BinaryType::Fxf } else { BinaryType::Flat })
 }