diff --git a/cpu/cpu.cpp b/cpu/cpu.cpp
index 989283c..310a077 100644
--- a/cpu/cpu.cpp
+++ b/cpu/cpu.cpp
@@ -65,8 +65,8 @@ u16 Cpu::readPC16()
 
 void Cpu::pushStack8(u8 data)
 {
-  bus->write8(state.SP, data);
   state.SP--;
+  bus->write8(state.SP, data);
 }
 
 u8 Cpu::popStack8()
@@ -78,8 +78,8 @@ u8 Cpu::popStack8()
 
 void Cpu::pushStack16(u16 data)
 {
-  bus->write16(state.SP,data);
   state.SP-=2;
+  bus->write16(state.SP,data);
 }
 
 u16 Cpu::popStack16()