diff --git a/src/parse.c b/src/parse.c
index dd481df..0ca48e4 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -2726,6 +2726,35 @@ Dsymbols *Parser::parseDeclarations(StorageClass storage_class, unsigned char *c
                 addComment(s, comment);
                 return a;
             }
+            // alias this = identifier;
+            Token *tk = peek(&token);
+            if (token.value == TOKthis && tk->value == TOKassign &&
+                peek(tk)->value == TOKidentifier)
+            {
+                check(TOKthis);
+                check(TOKassign);
+                AliasThis *s = new AliasThis(this->loc, token.ident);
+                nextToken();
+                check(TOKsemicolon);
+                a = new Dsymbols();
+                a->push(s);
+                addComment(s, comment);
+                return a;
+            }
+            // alias identifier = expression;
+            if (token.value == TOKidentifier && tk->value == TOKassign)
+            {
+                Identifier *id = token.ident;
+                nextToken();
+                check(TOKassign);
+                t = parseType();
+                check(TOKsemicolon);
+                Declaration *v = new AliasDeclaration(loc, id, t);
+                a = new Dsymbols();
+                a->push(v);
+                addComment(v, comment);
+                return a;
+            }
             break;
         case TOKtypedef:
             if (!global.params.useDeprecated)