diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index a933f5b..63057aa 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -31,6 +31,8 @@
 - library
 
   - added "tob", a text output buffer
+  - added "c:get/ext", for reading keys and returning unique
+    codes for arrows
 
 - retro-compiler
 
diff --git a/library/c-get-ext.retro b/library/c-get-ext.retro
new file mode 100644
index 0000000..bb7e90c
--- /dev/null
+++ b/library/c-get-ext.retro
@@ -0,0 +1,10 @@
+~~~
+:keys:UP    #-300 ;
+:keys:DOWN  #-301 ;
+:keys:RIGHT #-302 ;
+:keys:LEFT  #-303 ;
+
+:c:get/ext (-c)
+  c:get dup #27 eq?
+  [ drop c:get drop c:get #235 + n:negate ] if ;
+~~~