diff --git a/crates/pacdef_core/src/env.rs b/crates/pacdef_core/src/env.rs
index 6991e37..fe6dd6a 100644
--- a/crates/pacdef_core/src/env.rs
+++ b/crates/pacdef_core/src/env.rs
@@ -14,6 +14,8 @@ fn get_single_var(variable: &str) -> Option<String> {
     var(variable).ok()
 }
 
+/// Determine if debug information should be printed. Will return `true` if RUST_BACKTRACE equals
+/// "s" or "full".
 pub fn should_print_debug_info() -> bool {
     match get_single_var("RUST_BACKTRACE") {
         Some(value) if ["s", "full"].contains(&value.as_str()) => true,