diff --git a/ktlint-baseline.xml b/ktlint-baseline.xml
index fdabf218f7..4327ef2957 100644
--- a/ktlint-baseline.xml
+++ b/ktlint-baseline.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <baseline version="1.0">
-	<file name="/ktlint/src/test/resources/TestBaselineExtraErrorFile.kt">
+	<file name="ktlint/src/test/resources/TestBaselineExtraErrorFile.kt">
 		<error line="1" column="34" source="no-empty-class-body" />
 		<error line="2" column="1" source="no-blank-line-before-rbrace" />
 	</file>
-	<file name="/ktlint/src/test/resources/TestBaselineFile.kt">
+	<file name="ktlint/src/test/resources/TestBaselineFile.kt">
 		<error line="1" column="24" source="no-empty-class-body" />
 		<error line="2" column="1" source="no-blank-line-before-rbrace" />
 	</file>
diff --git a/ktlint-reporter-baseline/src/main/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporter.kt b/ktlint-reporter-baseline/src/main/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporter.kt
index caf9b90852..a99a191aed 100644
--- a/ktlint-reporter-baseline/src/main/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporter.kt
+++ b/ktlint-reporter-baseline/src/main/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporter.kt
@@ -23,15 +23,11 @@ class BaselineReporter(val out: PrintStream) : Reporter {
         out.println("""<baseline version="1.0">""")
         for ((file, errList) in acc.entries.sortedBy { it.key }) {
             val fileName = try {
-                Paths.get("").toAbsolutePath().relativize(File(file).toPath()).toString().replace('\\', '/')
+                val rootPath = Paths.get("").toAbsolutePath()
+                val filePath = Paths.get(file)
+                rootPath.relativize(filePath).toString().replace(File.separatorChar, '/')
             } catch (e: IllegalArgumentException) {
                 file
-            }.let { name ->
-                if (name[0] != '/') {
-                    "/$name"
-                } else {
-                    name
-                }
             }
             out.println("""	<file name="${fileName.escapeXMLAttrValue()}">""")
             for ((line, col, ruleId, _) in errList) {
diff --git a/ktlint-reporter-baseline/src/test/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporterTest.kt b/ktlint-reporter-baseline/src/test/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporterTest.kt
index 0e82f9f31e..edcece007c 100644
--- a/ktlint-reporter-baseline/src/test/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporterTest.kt
+++ b/ktlint-reporter-baseline/src/test/kotlin/com/pinterest/ktlint/reporter/baseline/BaselineReporterTest.kt
@@ -61,10 +61,10 @@ class BaselineReporterTest {
 """
 <?xml version="1.0" encoding="utf-8"?>
 <baseline version="1.0">
-	<file name="/one-fixed-and-one-not.kt">
+	<file name="one-fixed-and-one-not.kt">
 		<error line="1" column="1" source="rule-1" />
 	</file>
-	<file name="/two-not-fixed.kt">
+	<file name="two-not-fixed.kt">
 		<error line="1" column="10" source="rule-1" />
 		<error line="2" column="20" source="rule-2" />
 	</file>
diff --git a/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/BaselineUtils.kt b/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/BaselineUtils.kt
index 338056da34..ad9908b7de 100644
--- a/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/BaselineUtils.kt
+++ b/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/BaselineUtils.kt
@@ -113,10 +113,8 @@ internal fun List<LintError>.containsLintError(error: LintError): Boolean {
  * Also adjusts the slashes for uniformity between file systems
  */
 internal val File.relativeRoute: String
-    get() = Paths.get("").toAbsolutePath().relativize(this.toPath()).toString().replace('\\', '/').let { name ->
-        if (name[0] != '/') {
-            "/$name"
-        } else {
-            name
-        }
+    get() {
+        val rootPath = Paths.get("").toAbsolutePath()
+        val filePath = this.toPath()
+        return rootPath.relativize(filePath).toString().replace(File.separatorChar, '/')
     }
diff --git a/ktlint/src/test/resources/test-baseline.xml b/ktlint/src/test/resources/test-baseline.xml
index 697e92ea2f..e4eff23900 100644
--- a/ktlint/src/test/resources/test-baseline.xml
+++ b/ktlint/src/test/resources/test-baseline.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <baseline version="1.0">
-    <file name="/src/test/resources/TestBaselineFile.kt">
+    <file name="src/test/resources/TestBaselineFile.kt">
         <error line="1" column="24" source="no-empty-class-body" />
         <error line="2" column="1" source="no-blank-line-before-rbrace" />
     </file>
-    <file name="/src/test/resources/TestBaselineExtraErrorFile.kt">
+    <file name="src/test/resources/TestBaselineExtraErrorFile.kt">
         <error line="1" column="24" source="no-empty-class-body" />
     </file>
 </baseline>