2 files changed, 6 insertions, 1 deletions
diff --git a/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt b/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt
index 24840a9d..0f6f217e 100644
--- a/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt
+++ b/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt
@@ -575,7 +575,8 @@ class DocumentationBuilder
                 ClassMember(it, inheritedLinkKind = RefKind.InheritedCompanionObjectMember)
             }
 
-            if (companionObjectDescriptor.getAllSuperclassesWithoutAny().isNotEmpty()) {
+            if (companionObjectDescriptor.getAllSuperclassesWithoutAny().isNotEmpty()
+                    || companionObjectDescriptor.getSuperInterfaces().isNotEmpty()) {
                 result += ClassMember(companionObjectDescriptor)
             }
         }
diff --git a/core/src/test/kotlin/format/MarkdownFormatTest.kt b/core/src/test/kotlin/format/MarkdownFormatTest.kt
index f572922c..d2ab5b5c 100644
--- a/core/src/test/kotlin/format/MarkdownFormatTest.kt
+++ b/core/src/test/kotlin/format/MarkdownFormatTest.kt
@@ -396,6 +396,10 @@ class MarkdownFormatTest {
         verifyMarkdownNodeByName("notPublishedTypeAliasAutoExpansion", "foo", includeNonPublic = false)
     }
 
+    @Test fun companionImplements() {
+        verifyMarkdownNodeByName("companionImplements", "Foo")
+    }
+
     private fun buildMultiplePlatforms(path: String): DocumentationModule {
         val module = DocumentationModule("test")
         val options = DocumentationOptions("", "html", generateIndexPages = false, noStdlibLink = true)