diff --git a/pc/instrs/INSTRS b/pc/instrs/INSTRS
index c4f7fe2..9d10827 100644
--- a/pc/instrs/INSTRS
+++ b/pc/instrs/INSTRS
@@ -351,8 +351,6 @@ cretnz
 # push rbp
 # mov rbp, rsp
 enter
-centerz
-centernz
 
 # mov rbp, [rsp+8]
 # add rsp, 8
diff --git a/pc/instrs/stack.c b/pc/instrs/stack.c
index 6686d71..d741a2f 100644
--- a/pc/instrs/stack.c
+++ b/pc/instrs/stack.c
@@ -8,7 +8,6 @@ IMPL_COND(push);
 IMPL_COND(pop);
 IMPL_COND(call);
 IMPL_COND(ret);
-IMPL_COND(enter);
 IMPL_COND(leave);
 
 //