diff --git a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/KotlinSymbolProcessingExtension.kt b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/KotlinSymbolProcessingExtension.kt
index 2c044d6752..ccc1dd57aa 100644
--- a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/KotlinSymbolProcessingExtension.kt
+++ b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/KotlinSymbolProcessingExtension.kt
@@ -490,7 +490,7 @@ abstract class AbstractKotlinSymbolProcessingExtension(
                     roundDir.walkTopDown().forEach {
                         val dst = File(options.javaOutputDir, File(it.path).toRelativeString(roundDir))
                         if (dst.isFile || !dst.exists()) {
-                            copyWithTimestamp(it, dst, false)
+                            copyWithTimestamp(it, dst, overwrite = dst.isFile)
                         }
                     }
                 }