diff --git a/stk500v2/main.cpp b/stk500v2/main.cpp
index 8a43c13..36049f8 100644
--- a/stk500v2/main.cpp
+++ b/stk500v2/main.cpp
@@ -605,7 +605,7 @@ void startup() __attribute__((naked, section(".vectors")));
 void startup()
 {
 	asm volatile("clr __zero_reg__");
-	// SP = RAMEND;
+	SP = RAMEND;
 	SREG = 0;
 	asm volatile("jmp main");
 }