--- a/bristol/bristolmemorymoog.c
+++ b/bristol/bristolmemorymoog.c
@@ -33,6 +33,7 @@
 #include "bristolmemorymoog.h"
 
 extern int buildCurrentTable(Baudio *, float);
+extern void doPitchWheel(Baudio *);
 
 /*
  * Use of these memorymoog global buffers will be an issue with use of multiple