diff --git a/common/d3des.c b/common/d3des.c
index 7cb3bf0..db999a5 100644
--- a/common/d3des.c
+++ b/common/d3des.c
@@ -129,14 +129,6 @@ static void cookey(register unsigned long *raw1)
 	return;
 	}
 
-void rfbCPKey(register unsigned long *into)
-{
-	register unsigned long *from, *endp;
-
-	from = KnL, endp = &KnL[32];
-	while( from < endp ) *into++ = *from++;
-	return;
-	}
 
 void rfbUseKey(register unsigned long *from)
 {
diff --git a/common/d3des.h b/common/d3des.h
index e3761ca..bb7d182 100644
--- a/common/d3des.h
+++ b/common/d3des.h
@@ -37,12 +37,6 @@ extern void rfbUseKey(unsigned long *);
  * Loads the internal key register with the data in cookedkey.
  */
 
-extern void rfbCPKey(unsigned long *);
-/*		   cookedkey[32]
- * Copies the contents of the internal key register into the storage
- * located at &cookedkey[0].
- */
-
 extern void rfbDes(unsigned char *, unsigned char *);
 /*		    from[8]	      to[8]
  * Encrypts/Decrypts (according to the key currently loaded in the
diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index ac2a983..a024bb4 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -2426,7 +2426,6 @@ PrintPixelFormat(rfbPixelFormat *format)
 #define rfbDes rfbClientDes
 #define rfbDesKey rfbClientDesKey
 #define rfbUseKey rfbClientUseKey
-#define rfbCPKey rfbClientCPKey
 
 #include "vncauth.c"
 #include "d3des.c"