diff --git a/src/main/wacc/backend/asmGenerator.scala b/src/main/wacc/backend/asmGenerator.scala
index 7964cf4..df863a7 100644
--- a/src/main/wacc/backend/asmGenerator.scala
+++ b/src/main/wacc/backend/asmGenerator.scala
@@ -164,7 +164,8 @@ object asmGenerator {
   def funcPrologue(): List[AsmLine] = {
     List(
       Push(Register(RegSize.R64, RegName.BP)),
-      Move(Register(RegSize.R64, RegName.BP), Register(RegSize.R64, RegName.SP))
+      Move(Register(RegSize.R64, RegName.BP), Register(RegSize.R64, RegName.SP)),
+      Move(Register(RegSize.R64, RegName.AX), ImmediateVal(0))
     )
   }