diff --git a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/KaptConfig.kt b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/KaptConfig.kt
index 3f375d38e9d..38a84686673 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/KaptConfig.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/KaptConfig.kt
@@ -143,8 +143,8 @@ internal open class KaptConfig<TASK : KaptTask>(
 
 //Have to avoid using FileUtil because it is required system property reading that is not allowed for configuration cache
 private fun isAncestor(dir: File, file: File): Boolean {
-    val path = file.canonicalPath
-    val prefix = dir.canonicalPath
+    val path = file.normalize().absolutePath
+    val prefix = dir.normalize().absolutePath
     val pathLength = path.length
     val prefixLength = prefix.length
     val caseSensitive = true
diff --git a/plugins/kapt3/kapt3-base/test/KaptPathsTest.kt b/plugins/kapt3/kapt3-base/test/KaptPathsTest.kt
index 02b52f7fe6b..16f5782056b 100644
--- a/plugins/kapt3/kapt3-base/test/KaptPathsTest.kt
+++ b/plugins/kapt3/kapt3-base/test/KaptPathsTest.kt
@@ -35,9 +35,8 @@ class KaptPathsTest {
 
             val symlinkToOtherJava = Files.createSymbolicLink(File(tempDir, "Other.java").toPath(), otherJava.toPath()).toFile()
             val symlinkToNotJava = Files.createSymbolicLink(File(tempDir, "NotJava.java").toPath(), notJava.toPath()).toFile()
-            val symlinkToJavaRootDir = Files.createSymbolicLink(File(tempDir, "java2").toPath(), javaRootDir.toPath()).toFile()
 
-            val javaRoots = listOf(simpleJava, symlinkToOtherJava, symlinkToNotJava, symlinkToJavaRootDir, javaRootDir)
+            val javaRoots = listOf(simpleJava, symlinkToOtherJava, symlinkToNotJava, javaRootDir)
 
             val paths = KaptOptions.Builder().apply {
                 javaSourceRoots.addAll(javaRoots)
@@ -53,7 +52,7 @@ class KaptPathsTest {
                 assertTrue(javaSourceFiles.any { it.toRelativeString(tempDir) == path }) { "Can't find path $path\nAvailable: $available" }
             }
 
-            assertEquals(4, javaSourceFiles.size)
+            assertEquals(4, javaSourceFiles.size, "Actual content: ${javaSourceFiles}")
             assertContains("Simple.java")
             assertContains("Other.java")
             assertContains("NotJava.java")