diff --git a/bochs/config.h.in b/bochs/config.h.in
index ddd0eecdd..c8fbb658a 100644
--- a/bochs/config.h.in
+++ b/bochs/config.h.in
@@ -232,7 +232,7 @@
 #error You must use SMF to have plugins
 #endif
 
-#define USE_RAW_SERIAL 0
+#define BX_USE_RAW_SERIAL 0
 
 // This option enables RAM file backing for large guest memory with a smaller
 // amount host memory, without causing a panic when host memory is exhausted.