diff --git a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/DescriptorUtils.kt b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/DescriptorUtils.kt
index 03c7211ae7..a8d51b38c2 100644
--- a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/DescriptorUtils.kt
+++ b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/DescriptorUtils.kt
@@ -90,7 +90,9 @@ fun MemberDescriptor.toKSModifiers(): Set<Modifier> {
         JavaDescriptorVisibilities.PROTECTED_AND_PACKAGE,
         JavaDescriptorVisibilities.PROTECTED_STATIC_VISIBILITY,
         -> modifiers.add(Modifier.PROTECTED)
-        DescriptorVisibilities.PRIVATE, DescriptorVisibilities.LOCAL -> modifiers.add(Modifier.PRIVATE)
+        DescriptorVisibilities.PRIVATE,
+        DescriptorVisibilities.PRIVATE_TO_THIS,
+        DescriptorVisibilities.LOCAL -> modifiers.add(Modifier.PRIVATE)
         DescriptorVisibilities.INTERNAL -> modifiers.add(Modifier.INTERNAL)
         // Since there is no modifier for package-private, use No modifier to tell if a symbol from binary is package private.
         JavaDescriptorVisibilities.PACKAGE_VISIBILITY, JavaDescriptorVisibilities.PROTECTED_STATIC_VISIBILITY -> Unit