diff --git a/src/main/kc/include/conio.h b/src/main/kc/include/conio.h
index 18cf68bc9..7eae2a92e 100644
--- a/src/main/kc/include/conio.h
+++ b/src/main/kc/include/conio.h
@@ -70,6 +70,11 @@ unsigned char kbhit (void);
 // The function returns the old cursor setting.
 unsigned char cursor(unsigned char onoff);
 
+// If onoff is 1, scrolling is enabled when outputting past the end of the screen
+// If onoff is 1, scrolling is disabled and the cursor instead moves to (0,0)
+// The function returns the old scroll setting.
+unsigned char scroll(unsigned char onoff);
+
 // The horizontal line character
 const char CH_HLINE = 0x40;
 // The vertical line character