diff --git a/src/CxbxDebugger/Debugger/DebuggerMessages.cs b/src/CxbxDebugger/Debugger/DebuggerMessages.cs
index 9c6029a9a..eed6035b7 100644
--- a/src/CxbxDebugger/Debugger/DebuggerMessages.cs
+++ b/src/CxbxDebugger/Debugger/DebuggerMessages.cs
@@ -19,10 +19,10 @@ namespace CxbxDebugger
             FILE_WRITE = 0x3002,
             FILE_CLOSED = 0x3003,
 
-            DEBUGGER_INIT = 0x400,
-            DEBUGGER_NEW_TARGET = 0x401,
+            DEBUGGER_INIT = 0x4000,
+            DEBUGGER_NEW_TARGET = 0x4001,
 
-            OVERRIDE_EXCEPTION = 0x500,
+            OVERRIDE_EXCEPTION = 0x5000,
 
             // Exception code from https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
             MS_VC_EXCEPTION = 0x406D1388,
diff --git a/src/common/CxbxDebugger.cpp b/src/common/CxbxDebugger.cpp
index 3f9d4f801..86d886afc 100644
--- a/src/common/CxbxDebugger.cpp
+++ b/src/common/CxbxDebugger.cpp
@@ -46,10 +46,10 @@ namespace CxbxDebugger
 			FILE_WRITE = 0x3002,
 			FILE_CLOSED = 0x3003,
 
-			DEBUGGER_INIT = 0x400,
-			DEBUGGER_NEW_TARGET = 0x401,
+			DEBUGGER_INIT = 0x4000,
+			DEBUGGER_NEW_TARGET = 0x4001,
 
-			OVERRIDE_EXCEPTION = 0x500,
+			OVERRIDE_EXCEPTION = 0x5000,
 		};
 
 		bool IsAttached()