diff --git a/include/pocketpy/export.h b/include/pocketpy/export.h
index 676e7d09..899e42d3 100644
--- a/include/pocketpy/export.h
+++ b/include/pocketpy/export.h
@@ -54,6 +54,7 @@
 #define NOPROFILER        // Profiler interface.
 #define NODEFERWINDOWPOS  // DeferWindowPos routines
 #define NOMCX             // Modem Configuration Extensions
+#define MMNOSOUND         // Sound support
 
 /* Type required before windows.h inclusion  */
 typedef struct tagMSG *LPMSG;