diff --git a/cMIPS/include/cMIPS.h b/cMIPS/include/cMIPS.h
index 5d6b40059cb49ca347767797fbe347d176a6f127..b0e414f653c097948b4b1cf4176eca1649cb7586 100644
--- a/cMIPS/include/cMIPS.h
+++ b/cMIPS/include/cMIPS.h
@@ -46,6 +46,7 @@ extern void disableInterr(void);
 
 // internal counter, CP0 register COUNT
 extern int startCount(void);
+extern int stopCount(void);
 extern int readCount(void);
 
 extern char *memcpy(char*, const char*, int);