diff --git a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/Incremental.kt b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/Incremental.kt
index a050fdd78b..08b56d45f3 100644
--- a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/Incremental.kt
+++ b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/Incremental.kt
@@ -195,7 +195,8 @@ class IncrementalContext(
 
     private val baseDir = options.projectBaseDir
     private val PATH_CONVERTER = RelativeFileToPathConverter(baseDir)
-    private val icContext = IncrementalCompilationContext(PATH_CONVERTER)
+    private val icContext =
+        IncrementalCompilationContext(pathConverter = PATH_CONVERTER, trackChangesInLookupCache = true)
 
     // Sealed classes / interfaces on which `getSealedSubclasses` is invoked.
     // This is saved across processing.