diff --git a/src/getchar.c b/src/getchar.c
index 9939bbd..2fbbd4f 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -2331,7 +2331,7 @@
     int	    c = *p;
 
     if (typebuf.tb_len > 3
-	    && c == K_SPECIAL
+	    && (c == K_SPECIAL || c == CSI)  // CSI is used by the GUI
 	    && p[1] == KS_MODIFIER
 	    && (p[2] & MOD_MASK_CTRL))
 	c = p[3] & 0x1f;