diff --git a/fbdoom/i_video.h b/fbdoom/i_video.h
index 3c7db19..145587c 100644
--- a/fbdoom/i_video.h
+++ b/fbdoom/i_video.h
@@ -110,6 +110,7 @@ void I_FinishUpdate (void);
 void I_ReadScreen (byte* scr);
 
 void I_BeginRead (void);
+void I_EndRead(void);
 
 void I_SetWindowTitle(char *title);