diff --git a/src/core/gdbstub/gdbstub.cpp b/src/core/gdbstub/gdbstub.cpp
index 820b19e1ac85cfa0493871d69162291cad641f2c..28d403158b4a2e5292db5b68f7b8ed20f1f095f6 100644
--- a/src/core/gdbstub/gdbstub.cpp
+++ b/src/core/gdbstub/gdbstub.cpp
@@ -646,7 +646,7 @@ static void ReadMemory() {
 
     u8* data = Memory::GetPointer(addr);
     if (!data) {
-        return SendReply("E0");
+        return SendReply("E00");
     }
 
     MemToGdbHex(reply, data, len);