diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y
index e0446e08..09748eba 100644
--- a/frontends/verilog/verilog_parser.y
+++ b/frontends/verilog/verilog_parser.y
@@ -759,7 +759,7 @@ assign_expr_list:
 	assign_expr | assign_expr_list ',' assign_expr;
 
 assign_expr:
-	expr '=' expr {
+	lvalue '=' expr {
 		ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, $1, $3));
 	};