diff --git a/parser.go b/parser.go
index 08abf27..e351ce7 100644
--- a/parser.go
+++ b/parser.go
@@ -510,8 +510,8 @@ func (parser *parser) expandOpAssign(scanner * scanner, tree *ast, tk *Token, al
 				if t, err = tree.addToken(NewToken(tk.row, tk.col, opSym, opString)); err == nil {
 
 					var subTree *ast
-					if subTree, err = parser.parseGeneral(scanner, false, allowVarRef, SymSemiColon, SymClosedRound); err == nil {
-						if scanner.Previous().IsOneOfA(SymSemiColon, SymClosedRound) {
+					if subTree, err = parser.parseGeneral(scanner, false, allowVarRef, SymSemiColon, SymClosedRound, SymClosedBrace, SymClosedSquare); err == nil {
+						if scanner.Previous().IsOneOfA(SymSemiColon, SymClosedRound, SymClosedBrace, SymClosedSquare) {
 							if err = scanner.UnreadToken(); err != nil {
 								return
 							}
diff --git a/t_expr_test.go b/t_expr_test.go
index be1f009..a920064 100644
--- a/t_expr_test.go
+++ b/t_expr_test.go
@@ -27,7 +27,8 @@ func TestExpr(t *testing.T) {
 		/*  13 */ {`a=3; a*=2+1; a`, int64(9), nil},
 		/*  14 */ {`a=3; (a*=2)+1; a`, int64(6), nil},
 		/*  15 */ {`a=3; a*=2)+1; a`, nil, `[1:11] unexpected token ")"`},
-		/*  16 */ {`
+		/*  16 */ {`v=[2]; a=1; v[a-=1]=5; v[0]`, int64(5), nil},
+		/*  17 */ {`
 		ds={
 			"init":func(@end){@current=0 but true},
 			//"current":func(){current},