diff --git a/compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tasks/dynamicCalls.kt b/compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tasks/dynamicCalls.kt
index 2db24ff4644..08ef0f2121d 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tasks/dynamicCalls.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tasks/dynamicCalls.kt
@@ -136,6 +136,7 @@ class DynamicCallableDescriptors(storageManager: StorageManager, builtIns: Kotli
                 Modality.FINAL,
                 Visibilities.PUBLIC
         )
+        functionDescriptor.setHasSynthesizedParameterNames(true)
         return functionDescriptor
     }
 
diff --git a/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/InlayParameterHintsTest.kt b/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/InlayParameterHintsTest.kt
index 2c508e0cc98..c3ea64652b8 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/InlayParameterHintsTest.kt
+++ b/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/InlayParameterHintsTest.kt
@@ -172,4 +172,10 @@ annotation class ManyArgs(val name: String, val surname: String)
             fun <T> T.test(block: (receiver: T, Int) -> Unit) = block(<hint text="receiver:"/>this, 0)
         """)
     }
+
+    fun `test dynamic`() {
+        check("""fun foo(x: dynamic) {
+            x.foo("123")
+        }""")
+    }
 }