diff --git a/Source/Core/Common/Src/ArmCPUDetect.cpp b/Source/Core/Common/Src/ArmCPUDetect.cpp
index f04d7d9b49..0c9a8c6e64 100644
--- a/Source/Core/Common/Src/ArmCPUDetect.cpp
+++ b/Source/Core/Common/Src/ArmCPUDetect.cpp
@@ -279,3 +279,8 @@ std::string CPUInfo::Summarize()
 
 	return sum;
 }
+
+bool CPUInfo::IsUnsafe()
+{
+	return false;
+}
diff --git a/Source/Core/Common/Src/CPUDetect.h b/Source/Core/Common/Src/CPUDetect.h
index 967be0949b..0463e11105 100644
--- a/Source/Core/Common/Src/CPUDetect.h
+++ b/Source/Core/Common/Src/CPUDetect.h
@@ -77,6 +77,7 @@ struct CPUInfo
 
 	// Turn the cpu info into a string we can show
 	std::string Summarize();
+	bool IsUnsafe();
 
 private:
 	// Detects the various cpu features
diff --git a/Source/Core/Common/Src/x64CPUDetect.cpp b/Source/Core/Common/Src/x64CPUDetect.cpp
index 2fa25e8074..b9ed2b538a 100644
--- a/Source/Core/Common/Src/x64CPUDetect.cpp
+++ b/Source/Core/Common/Src/x64CPUDetect.cpp
@@ -267,3 +267,8 @@ std::string CPUInfo::Summarize()
 	if (bLongMode) sum += ", 64-bit support";
 	return sum;
 }
+
+bool CPUInfo::IsUnsafe()
+{
+	return !bFlushToZero;
+}
diff --git a/Source/Core/Core/Src/Core.cpp b/Source/Core/Core/Src/Core.cpp
index ea54163c30..41d5c339d6 100644
--- a/Source/Core/Core/Src/Core.cpp
+++ b/Source/Core/Core/Src/Core.cpp
@@ -58,6 +58,7 @@
 
 #include "State.h"
 #include "Movie.h"
+#include "NetPlayProto.h"
 #include "PatchEngine.h"
 
 // TODO: ugly, remove
@@ -374,6 +375,10 @@ void EmuThread()
 	DisplayMessage(cpu_info.brand_string, 8000);
 	DisplayMessage(cpu_info.Summarize(), 8000);
 	DisplayMessage(_CoreParameter.m_strFilename, 3000);
+	if (cpu_info.IsUnsafe() && (NetPlay::IsNetPlayRunning() || Movie::IsRecordingInput() || Movie::IsPlayingInput()))
+	{
+		PanicAlertT("Warning: Netplay/movies will desync because your CPU does not support DAZ and Dolphin does not emulate it anymore.");
+	}
 
 	Movie::Init();