diff --git a/src/stack.asm b/src/stack.asm
index 74b1047..94fe418 100644
--- a/src/stack.asm
+++ b/src/stack.asm
@@ -1,7 +1,7 @@
 (37, 6, 0, 0, 0, 1, 1, 1, 0, 0, 3, 2, 1, 3, 0, 0, 0, 1, 2, 1, 1, 0, 0, 1, 0, 0, 2, 2, 1, 0, 0, 2, 2, 2, 3, 1, 3, 1)
 ADD(0, 0, r0)       // r0 current state in pushdown automaton
 ADD(2, 0, r1)       // r1 cursor position in input word, (i2 first symbol of input word, i1 length of input word)
-ADD(11, 0, r11)     // r11 address of stack top
+ADD(12, 0, r11)     // r11 address of stack top
 ADD(3, 0, r12)      // r12 bottom symbol
 ADD(i0, 1, r7)      // r7 address registry after last instruction in input
 ADD(i1, 2, r10)     // r10 last symbol of input word address + 1
@@ -51,8 +51,8 @@ JUMP(7)             // go to copy word on stack
 ADD(i@r6, 0, r0)    // a=symbol, A=symbol
 ADD(r1, 1, r1)      // move cursor in input word
 JE(i@r5, 0, 2)      // check if word to copy is empty
-JUMP(3)             // go to copy word on stack
 SUB(r11, 1, r11)
+JUMP(2)             // go to copy word on stack
 JUMP(-38)           // restart loop
 
 SUB(r6, 1, r9)      // address symbol to copy on stack