diff --git a/Cargo.lock b/Cargo.lock
index 360c89c..4a1cd60 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "bin2hpp"
-version = "0.2.1"
+version = "0.2.2"
 dependencies = [
  "thiserror",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 018b2b6..3e35866 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bin2hpp"
-version = "0.2.1"
+version = "0.2.2"
 authors = ["Adam Macdonald"]
 edition = "2024"
 license = "GPL-3.0-only"
diff --git a/src/cfg.rs b/src/cfg.rs
index 221f388..ee33c34 100644
--- a/src/cfg.rs
+++ b/src/cfg.rs
@@ -87,16 +87,12 @@ pub fn parse_config_from_args(args: &CliArgs) -> Result<Config, ProgramConfigErr
                 stem.retain(|c| c.is_ascii_alphanumeric());
 
                 let mut ext: String = match args.input_file_path.extension() {
-                    Some(s) => s.to_string_lossy().to_string(),
-                    None => {
-                        return Err(ProgramConfigError::InvalidPath(
-                            args.input_file_path.to_string_lossy().to_string(),
-                        ));
-                    }
+                    Some(s) => format!("_{}", s.to_string_lossy()),
+                    None => "".to_string(),
                 };
                 ext.retain(|c| c.is_ascii_alphanumeric());
 
-                format!("{}_{}", stem.to_ascii_uppercase(), ext.to_ascii_uppercase())
+                format!("{}{}", stem.to_ascii_uppercase(), ext.to_ascii_uppercase())
             }
         },
         namespace: match &args.namespace {