diff --git a/src/lib.rs b/src/lib.rs
index 8528d77..7864c2b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,8 @@
 use std::ffi::CStr;
 use libc::c_char;
 
+mod radio;
+
 const COPYRIGHT: &'static str = "Copyright (C) 2018 Serge Vakulenko KK6ABQ";
 
 #[no_mangle]
@@ -54,17 +56,6 @@ pub extern "C" fn process_options() {
 
 }
 
-extern {
-  fn radio_list_c();
-}
-
-#[no_mangle]
-pub extern "C" fn radio_list() {
-  unsafe {
-    radio_list_c();
-  }
-}
-
 #[cfg(test)]
 mod tests {
     #[test]
diff --git a/src/radio.rs b/src/radio.rs
new file mode 100644
index 0000000..58d293b
--- /dev/null
+++ b/src/radio.rs
@@ -0,0 +1,10 @@
+extern {
+  fn radio_list_c();
+}
+
+#[no_mangle]
+pub extern "C" fn radio_list() {
+  unsafe {
+    radio_list_c();
+  }
+}