diff --git a/xterm-keys.c b/xterm-keys.c
index 3c9fd3ba..5f8db986 100644
--- a/xterm-keys.c
+++ b/xterm-keys.c
@@ -128,6 +128,8 @@ xterm_keys_modifiers(const char *template, const char *buf, size_t len)
 		modifiers |= KEYC_ESCAPE;
 	if (param & 4)
 		modifiers |= KEYC_CTRL;
+	if (param & 8)
+		modifiers |= KEYC_ESCAPE;
 	return (modifiers);
 }
 
@@ -172,6 +174,8 @@ xterm_keys_lookup(int key)
 		modifiers += 2;
 	if (key & KEYC_CTRL)
 		modifiers += 4;
+	if (key & KEYC_ESCAPE)
+		modifiers += 8;
 
 	/*
 	 * If the key has no modifiers, return NULL and let it fall through to