diff --git a/include/JSystem/JSystem.h b/include/JSystem/JSystem.h
index 82231fe4d47..2b2f1143d00 100644
--- a/include/JSystem/JSystem.h
+++ b/include/JSystem/JSystem.h
@@ -1,7 +1,7 @@
 #ifndef JSYSTEM_H
 #define JSYSTEM_H
 
-#ifdef __MWERKS__
+#if __MWERKS__ && !defined(DECOMPCTX)
 #include "JSystem/JSystem.mch" // IWYU pragma: export
 #else
 #include "JSystem/JSystem.pch" // IWYU pragma: export