diff --git a/Core/MIPS/ARM/ArmJit.cpp b/Core/MIPS/ARM/ArmJit.cpp
index 9105d5bd8af3..f8613d0826bb 100644
--- a/Core/MIPS/ARM/ArmJit.cpp
+++ b/Core/MIPS/ARM/ArmJit.cpp
@@ -132,6 +132,9 @@ void ArmJit::DoState(PointerWrap &p)
 	if (!s)
 		return;
 
+	if (p.mode == PointerWrap::MODE_READ && !js.startDefaultPrefix) {
+		WARN_LOG(CPU, "Jit: An uneaten prefix was previously detected. Jitting in unknown-prefix mode.");
+	}
 	Do(p, js.startDefaultPrefix);
 	if (s >= 2) {
 		Do(p, js.hasSetRounding);
diff --git a/Core/MIPS/ARM64/Arm64Jit.cpp b/Core/MIPS/ARM64/Arm64Jit.cpp
index f50294ede589..7f7f4592569a 100644
--- a/Core/MIPS/ARM64/Arm64Jit.cpp
+++ b/Core/MIPS/ARM64/Arm64Jit.cpp
@@ -129,6 +129,9 @@ void Arm64Jit::DoState(PointerWrap &p) {
 		return;
 
 	Do(p, js.startDefaultPrefix);
+	if (p.mode == PointerWrap::MODE_READ && !js.startDefaultPrefix) {
+		WARN_LOG(CPU, "Jit: An uneaten prefix was previously detected. Jitting in unknown-prefix mode.");
+	}
 	if (s >= 2) {
 		Do(p, js.hasSetRounding);
 		if (p.mode == PointerWrap::MODE_READ) {
diff --git a/Core/MIPS/x86/Jit.cpp b/Core/MIPS/x86/Jit.cpp
index 36acbf5c996c..85285d055c39 100644
--- a/Core/MIPS/x86/Jit.cpp
+++ b/Core/MIPS/x86/Jit.cpp
@@ -144,6 +144,9 @@ void Jit::DoState(PointerWrap &p) {
 		return;
 
 	Do(p, js.startDefaultPrefix);
+	if (p.mode == PointerWrap::MODE_READ && !js.startDefaultPrefix) {
+		WARN_LOG(CPU, "Jit: An uneaten prefix was previously detected. Jitting in unknown-prefix mode.");
+	}
 	if (s >= 2) {
 		Do(p, js.hasSetRounding);
 		if (p.mode == PointerWrap::MODE_READ) {