diff --git a/crypto/bio/bio.h b/crypto/bio/bio.h
index f10930816..fbbc16d00 100644
--- a/crypto/bio/bio.h
+++ b/crypto/bio/bio.h
@@ -244,7 +244,7 @@ typedef struct bio_method_st
 	long (_far *ctrl)();
 	int (_far *create)();
 	int (_far *destroy)();
-	long (_fat *callback_ctrl)();
+	long (_far *callback_ctrl)();
 	} BIO_METHOD;
 #endif