diff --git a/btree_key.cpp b/btree_key.cpp
index 93ce914..8f88334 100644
--- a/btree_key.cpp
+++ b/btree_key.cpp
@@ -81,7 +81,7 @@
 } // copyKeyNull
 
 void 
-copyKeyString(void *, void *) {
+copyKeyString(void * srcKey, void * destkey) {
 
 } // copyKeyString