diff --git a/crates/sic_io/src/encode_settings.rs b/crates/sic_io/src/encode_settings.rs
index cc0384cb6..af1294294 100644
--- a/crates/sic_io/src/encode_settings.rs
+++ b/crates/sic_io/src/encode_settings.rs
@@ -4,6 +4,7 @@ use sic_core::image;
 
 pub mod gif;
 pub mod jpeg;
+pub mod pnm;
 
 pub struct EncodeSettings {
     pub pnm_sample_encoding: image::codecs::pnm::SampleEncoding,
diff --git a/crates/sic_io/src/encode_settings/pnm.rs b/crates/sic_io/src/encode_settings/pnm.rs
new file mode 100644
index 000000000..05c813e5d
--- /dev/null
+++ b/crates/sic_io/src/encode_settings/pnm.rs
@@ -0,0 +1,11 @@
+use sic_core::image::codecs::pnm::{PnmSubtype, SampleEncoding};
+
+// NB: Is now unused. Just as example for RUST-14319.
+pub fn pnm_subtype(sample_encoding: SampleEncoding) -> PnmSubtype {
+    let example = "pam";
+
+    match example {
+        "pam" => PnmSubtype::ArbitraryMap,
+        _ => PnmSubtype::Pixmap(sample_encoding),
+    }
+}