--- hard_pce.h.orig 2004-05-26 20:54:15 UTC
+++ hard_pce.h
@@ -64,8 +64,8 @@ void IO_write (UInt16 A,UChar V);
UChar IO_read (UInt16 A);
void bank_set (UChar P, UChar V);
-void (*write_memory_function)(UInt16,UChar);
-UChar (*read_memory_function)(UInt16);
+extern void (*write_memory_function)(UInt16,UChar);
+extern UChar (*read_memory_function)(UInt16);
#define Wr6502(A,V) ((*write_memory_function)((A),(V)))
