diff --git a/src/lib/internal.h b/src/lib/internal.h
index dc752028e..13e841e5c 100644
--- a/src/lib/internal.h
+++ b/src/lib/internal.h
@@ -1161,7 +1161,7 @@ static inline int
 mouse_enable(FILE* out){
 // Sets the shift-escape option, allowing shift+mouse to override the standard
 // mouse protocol (mainly so copy-and-paste can still be performed).
-#define XTSHIFTESCAPE "\x1b>1s"
+#define XTSHIFTESCAPE "\x1b[>1s"
   return term_emit(XTSHIFTESCAPE "\x1b[?" SET_BTN_EVENT_MOUSE ";"
                    /*SET_FOCUS_EVENT_MOUSE ";" */SET_SGR_MODE_MOUSE "h",
                    out, true);