diff --git a/lib/jsduck/merger.rb b/lib/jsduck/merger.rb
index e86b23ec45de3f52b821c7aca6d8f4465f8c8db7..5d8956483d7cea86e7c8449cfe149c24d3116d76 100644
--- a/lib/jsduck/merger.rb
+++ b/lib/jsduck/merger.rb
@@ -41,8 +41,6 @@ module JsDuck
         :singleton => false,
       })
 
-      h[:aliases] = build_aliases_hash(h[:aliases] || [])
-
       h[:enum] = merge_enum(docs, code) if docs[:enum]
 
       h[:members] = []
@@ -94,22 +92,6 @@ module JsDuck
       h
     end
 
-    # Given array of full alias names like "foo.bar", "foo.baz"
-    # build hash like {"foo" => ["bar", "baz"]}
-    def build_aliases_hash(aliases)
-      hash={}
-      aliases.each do |a|
-        if a =~ /^([^.]+)\.(.+)$/
-          if hash[$1]
-            hash[$1] << $2
-          else
-            hash[$1] = [$2]
-          end
-        end
-      end
-      hash
-    end
-
     def merge_params(docs, code)
       explicit = docs[:params] || []
       implicit = code_matches_doc?(docs, code) ? (code[:params] || []) : []
diff --git a/lib/jsduck/tag/alias.rb b/lib/jsduck/tag/alias.rb
index 28026262ad782d5d40d656e9b948b626d12e1d30..3b64c639eb0577f6e023c524dc1949221c23c290 100644
--- a/lib/jsduck/tag/alias.rb
+++ b/lib/jsduck/tag/alias.rb
@@ -8,6 +8,7 @@ module JsDuck::Tag
       @key = :aliases
       @ext_define_pattern = "alias"
       @ext_define_default = {:aliases => []}
+      @merge_context = :class
     end
 
     # For backwards compatibility decide whether the @alias was used
@@ -36,5 +37,25 @@ module JsDuck::Tag
     def parse_ext_define(cls, ast)
       cls[:aliases] += JsDuck::Js::Utils.make_string_list(ast)
     end
+
+    def merge(h, docs, code)
+      h[:aliases] = build_aliases_hash(docs[:aliases] || code[:aliases] || [])
+    end
+
+    # Given array of full alias names like "foo.bar", "foo.baz"
+    # build hash like {"foo" => ["bar", "baz"]}
+    def build_aliases_hash(aliases)
+      hash={}
+      aliases.each do |a|
+        if a =~ /^([^.]+)\.(.+)$/
+          if hash[$1]
+            hash[$1] << $2
+          else
+            hash[$1] = [$2]
+          end
+        end
+      end
+      hash
+    end
   end
 end