diff --git a/crypto/smartcont/stdlib.fc b/crypto/smartcont/stdlib.fc
index 0c621928..5c6a823e 100644
--- a/crypto/smartcont/stdlib.fc
+++ b/crypto/smartcont/stdlib.fc
@@ -641,7 +641,6 @@ forall X -> cell force_cast_to_cell(X x) asm "NOP";
 forall X -> slice force_cast_to_slice(X x) asm "NOP";
 forall X -> int force_cast_to_int(X x) asm "NOP";
 forall X -> tuple force_cast_to_tuple(X x) asm "NOP";
-forall X -> tuple unsafe_tuple(X x) asm "NOP";
 
 ;; get c5 register
 cell get_c5() asm "c5 PUSH";