3 files changed, 33 insertions, 8 deletions
diff --git a/core/src/main/kotlin/javadoc/docbase.kt b/core/src/main/kotlin/javadoc/docbase.kt
index aeb806f1..fcc017fd 100644
--- a/core/src/main/kotlin/javadoc/docbase.kt
+++ b/core/src/main/kotlin/javadoc/docbase.kt
@@ -521,12 +521,13 @@ class ModuleNodeAdapter(val module: DocumentationModule, val reporter: DocErrorR
 }
 
 private fun DocumentationNodeAdapter.collectParamTags(kind: NodeKind, sectionFilter: (ContentSection) -> Boolean) =
-        (node.details(kind)
-                .filter(DocumentationNode::hasNonEmptyContent)
-                .map { ParamTagAdapter(module, this, it.name, true, it.content.children) }
+    (node.details(kind)
+        .filter(DocumentationNode::hasNonEmptyContent)
+        .map { ParamTagAdapter(module, this, it.name, true, it.content.children) }
 
-                + node.content.sections
-                .filter(sectionFilter)
-                .map { ParamTagAdapter(module, this, it.subjectName ?: "?", true, it.children) })
-
-                .toTypedArray()
-\ No newline at end of file
+        + node.content.sections
+        .filter(sectionFilter)
+        .map { ParamTagAdapter(module, this, it.subjectName ?: "?", true, it.children) }
+    )
+    .distinctBy { it.parameterName }
+    .toTypedArray()
+\ No newline at end of file
diff --git a/core/src/test/kotlin/javadoc/JavadocTest.kt b/core/src/test/kotlin/javadoc/JavadocTest.kt
index b18dacca..9ca668d8 100644
--- a/core/src/test/kotlin/javadoc/JavadocTest.kt
+++ b/core/src/test/kotlin/javadoc/JavadocTest.kt
@@ -223,6 +223,16 @@ class JavadocTest {
         }
     }
 
+    @Test
+    fun shouldNotHaveDuplicatedConstructorParameters() {
+        verifyJavadoc("testdata/javadoc/constructorParameters.kt") { doc ->
+            val classDoc = doc.classNamed("bar.Banana")!!
+            val paramTags = classDoc.constructors()[0].paramTags()
+
+            assertEquals(3, paramTags.size)
+        }
+    }
+
     private fun verifyJavadoc(name: String,
                               withJdk: Boolean = false,
                               withKotlinRuntime: Boolean = false,
diff --git a/core/testdata/javadoc/constructorParameters.kt b/core/testdata/javadoc/constructorParameters.kt
new file mode 100644
index 00000000..c29ae912
--- /dev/null
+++ b/core/testdata/javadoc/constructorParameters.kt
@@ -0,0 +1,14 @@
+package bar
+
+/**
+ * Just a fruit
+ *
+ * @param weight in grams
+ * @param ranking quality from 0 to 10, where 10 is best
+ * @param color yellow is default
+ */
+class Banana (
+    private val weight: Double,
+    private val ranking: Int,
+    color: String = "yellow"
+)
+\ No newline at end of file