diff --git a/_fixtures/indexexpr.go b/_fixtures/indexexpr.go
new file mode 100644
index 0000000..68b2f39
--- /dev/null
+++ b/_fixtures/indexexpr.go
@@ -0,0 +1,4 @@
+package fixtures
+
+var a = longlistfunc(bigarg, otherbigarg, verylongarg, veryverylongarg, veryveryverylongarg, extremelylongarg)[0]
+var b = shortfunc(c, d, e)[1]
diff --git a/_fixtures/indexexpr__exp.go b/_fixtures/indexexpr__exp.go
new file mode 100644
index 0000000..fb4f57b
--- /dev/null
+++ b/_fixtures/indexexpr__exp.go
@@ -0,0 +1,11 @@
+package fixtures
+
+var a = longlistfunc(
+	bigarg,
+	otherbigarg,
+	verylongarg,
+	veryverylongarg,
+	veryveryverylongarg,
+	extremelylongarg,
+)[0]
+var b = shortfunc(c, d, e)[1]
diff --git a/shortener.go b/shortener.go
index 144d78f..b2cfc90 100644
--- a/shortener.go
+++ b/shortener.go
@@ -545,6 +545,8 @@ func (s *Shortener) formatExpr(expr dst.Expr, force bool, isChain bool) {
 		if shouldShorten {
 			s.formatFieldList(e.Params)
 		}
+	case *dst.IndexExpr:
+		s.formatExpr(e.X, shouldShorten, isChain)
 	case *dst.InterfaceType:
 		for _, method := range e.Methods.List {
 			if HasAnnotation(method) {