diff --git a/Cargo.toml b/Cargo.toml
index 65c96332..3dd65457 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,3 +19,4 @@ lalrpop-util = "0.19"
 regex = "1"
 sexp = "1.1"
 thiserror = "1.0"
+walkdir = "2"
diff --git a/src/bin/casc.rs b/src/bin/casc.rs
index 58053c45..6ddad681 100644
--- a/src/bin/casc.rs
+++ b/src/bin/casc.rs
@@ -6,6 +6,7 @@ use selinux_cascade::error::ErrorItem;
 use clap::Parser;
 use std::fs::File;
 use std::io::{Error, ErrorKind, Write};
+use walkdir::WalkDir;
 
 #[derive(Parser, Debug)]
 #[clap(author, version, name = "casc")]
@@ -16,9 +17,9 @@ struct Args {
 
 fn main() -> std::io::Result<()> {
     let args = Args::parse();
-    let policies: Vec<&str> = args.input_file.iter().map(|s| s as &str).collect();
+    let policies: Vec<String> = get_policy_files(args.input_file);
     let mut out_file = File::create("out.cil")?;
-    let res = compile_system_policy(policies);
+    let res = compile_system_policy(policies.iter().map(|s| s as &str).collect());
     match res {
         Err(error_list) => {
             for e in error_list {
@@ -35,3 +36,32 @@ fn main() -> std::io::Result<()> {
         Ok(s) => out_file.write_all(s.as_bytes()),
     }
 }
+
+// Create a list of policy files
+// Display info and proceed on errors.  As long as we have at least one file, errors should be
+// considered non-fatal
+fn get_policy_files(filenames: Vec<String>) -> Vec<String> {
+    let mut policy_files = Vec::new();
+    for file in filenames {
+        for entry in WalkDir::new(file) {
+            match entry {
+                Ok(entry) => {
+                    if entry.file_type().is_file()
+                        && entry.path().extension().unwrap_or_default() == "cas"
+                    {
+                        let filename = entry.path().display().to_string();
+                        policy_files.push(filename);
+                    }
+                }
+                Err(e) => {
+                    if let Some(path) = e.path() {
+                        eprintln!("{}: {}", path.display(), e);
+                    } else {
+                        eprintln!("{}", e);
+                    }
+                }
+            }
+        }
+    }
+    policy_files
+}