diff --git a/Windows/Debugger/Debugger_Disasm.cpp b/Windows/Debugger/Debugger_Disasm.cpp
index 584533703d..580166e407 100644
--- a/Windows/Debugger/Debugger_Disasm.cpp
+++ b/Windows/Debugger/Debugger_Disasm.cpp
@@ -291,11 +291,10 @@ void CDisasm::stepOver()
 	UpdateDialog();
 }
 
-void CDisasm::stepOut()
-{
-	if (!PSP_IsInited()) {
+void CDisasm::stepOut() {
+	auto memLock = Memory::Lock();
+	if (!PSP_IsInited())
 		return;
-	}
 
 	auto threads = GetThreadsInfo();
 
diff --git a/Windows/Debugger/Debugger_Lists.cpp b/Windows/Debugger/Debugger_Lists.cpp
index 97be390f59..0c76c4d936 100644
--- a/Windows/Debugger/Debugger_Lists.cpp
+++ b/Windows/Debugger/Debugger_Lists.cpp
@@ -700,8 +700,11 @@ void CtrlStackTraceView::OnDoubleClick(int itemIndex, int column)
 	SendMessage(GetParent(GetHandle()),WM_DEB_GOTOWPARAM,frames[itemIndex].pc,0);
 }
 
-void CtrlStackTraceView::loadStackTrace()
-{
+void CtrlStackTraceView::loadStackTrace() {
+	auto memLock = Memory::Lock();
+	if (!PSP_IsInited())
+		return;
+
 	auto threads = GetThreadsInfo();
 
 	u32 entry = 0, stackTop = 0;