diff --git a/src/message.c b/src/message.c
index a258e78..98a3624 100644
--- a/src/message.c
+++ b/src/message.c
@@ -1842,7 +1842,11 @@
     }
 
     c = *str;
-    if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL)
+    if ((c == K_SPECIAL
+#ifdef FEAT_GUI
+		|| c == CSI
+#endif
+	) && str[1] != NUL && str[2] != NUL)
     {
 	if (str[1] == KS_MODIFIER)
 	{
@@ -1850,7 +1854,11 @@
 	    str += 3;
 	    c = *str;
 	}
-	if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL)
+	if ((c == K_SPECIAL
+#ifdef FEAT_GUI
+		    || c == CSI
+#endif
+	    ) && str[1] != NUL && str[2] != NUL)
 	{
 	    c = TO_SPECIAL(str[1], str[2]);
 	    str += 2;
diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index 1cf2b0f..acc72f8 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -1687,4 +1687,9 @@
   iunmap <C-D>t
 endfunc
 
+func Test_gui_csi_keytrans()
+  call assert_equal('<C-L>', keytrans("\x9b\xfc\x04L"))
+  call assert_equal('<C-D>', keytrans("\x9b\xfc\x04D"))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 593b7d5..2cad2b4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1826,
+/**/
     1825,
 /**/
     1824,