diff --git a/lib/jsduck/tag/tag.rb b/lib/jsduck/tag/tag.rb
index adf5ec6e112c2fc5d4d7ee29a9770edd6a048206..a2506b58c5a48b977280036681a3ec94c4a212b5 100644
--- a/lib/jsduck/tag/tag.rb
+++ b/lib/jsduck/tag/tag.rb
@@ -70,11 +70,8 @@ module JsDuck::Tag
     end
 
     # In the context of which members or classes invoke the #merge
-    # method.  Possible values are:
-    #
-    # - :class
-    # - :member
-    #
+    # method.  This can be either a single tagname like :class,
+    # :method, :cfg or an array of these.
     attr_reader :merge_context
 
     # Merges documentation and code hashes into the result hash.
diff --git a/lib/jsduck/tag_registry.rb b/lib/jsduck/tag_registry.rb
index 4b2f73fa691aabf2949dde5fc8cbb8fe3e6c32bc..fabd61005845dd9a6e3ce05b52318e4da106c81f 100644
--- a/lib/jsduck/tag_registry.rb
+++ b/lib/jsduck/tag_registry.rb
@@ -12,7 +12,7 @@ module JsDuck
       @ext_define_patterns = {}
       @ext_define_defaults = {}
       @keys = {}
-      @mergers = {:class => [], :member => []}
+      @mergers = {}
       @signatures = []
       @html_renderers = {:top => [], :bottom => []}
       @member_types = []
@@ -42,8 +42,9 @@ module JsDuck
         if tag.key
           @keys[tag.key] = tag
         end
-        if tag.merge_context
-          @mergers[tag.merge_context] << tag
+        Array(tag.merge_context).each do |context|
+          @mergers[context] = [] unless @mergers[context]
+          @mergers[context] << tag
         end
         if tag.member_type
           @member_types << tag.member_type