diff --git a/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt b/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
index 14017a8b6c8..708600f6b22 100644
--- a/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
+++ b/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
@@ -1365,7 +1365,8 @@ open class KotlinFileExtractor(
                 extractTypeAccessRecursive(substitutedType, location, id, -1)
             }
             val syntheticParameterNames =
-                vp.origin == IrDeclarationOrigin.UNDERSCORE_PARAMETER ||
+                (vp.origin == IrDeclarationOrigin.UNDERSCORE_PARAMETER &&
+                    vp.name.asString() != "_") ||
                     ((vp.parent as? IrFunction)?.let { hasSynthesizedParameterNames(it) } ?: true)
             val javaParameter =
                 when (val callable = (vp.parent as? IrFunction)?.let { getJavaCallable(it) }) {
diff --git a/java/ql/test-kotlin1/library-tests/underscore-parameters/test.expected b/java/ql/test-kotlin1/library-tests/underscore-parameters/test.expected
index ba0fd4346e4..7f53cabf845 100644
--- a/java/ql/test-kotlin1/library-tests/underscore-parameters/test.expected
+++ b/java/ql/test-kotlin1/library-tests/underscore-parameters/test.expected
@@ -1 +1 @@
-| test.kt:5:9:5:9 | p0 | p0 |
+| test.kt:5:9:5:9 | _ | _ |