diff --git a/terminfo/dynamic/dynamic.go b/terminfo/dynamic/dynamic.go
index 08ff248..5340715 100644
--- a/terminfo/dynamic/dynamic.go
+++ b/terminfo/dynamic/dynamic.go
@@ -314,6 +314,8 @@ func LoadTerminfo(name string) (*terminfo.Terminfo, string, error) {
 	// but modern XTerm and emulators often have them.  Let's add them,
 	// if the shifted right and left arrows are defined.
 	if t.KeyShfRight == "\x1b[1;2C" && t.KeyShfLeft == "\x1b[1;2D" {
+		t.Modifiers = terminfo.ModifiersXTerm
+
 		t.KeyShfUp = "\x1b[1;2A"
 		t.KeyShfDown = "\x1b[1;2B"
 		t.KeyMetaUp = "\x1b[1;9A"