diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97e671c8804..44d9c728530 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## 0.26.4
 
+* `Common`:
+  * Add expect/actual `MPPFilePathSeparator`
+  * Fix `FileName` realization to take care about system file path separator
+
 ## 0.26.3
 
 * `Versions`:
diff --git a/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MPPFile.kt b/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MPPFile.kt
index 7aef8ed8c9a..403d4955407 100644
--- a/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MPPFile.kt
+++ b/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MPPFile.kt
@@ -7,7 +7,7 @@ import kotlin.jvm.JvmInline
 @JvmInline
 value class FileName(val string: String) {
     val name: String
-        get() = withoutSlashAtTheEnd.takeLastWhile { it != '/' }
+        get() = withoutSlashAtTheEnd.takeLastWhile { it != MPPFilePathSeparator }
     val extension: String
         get() = name.takeLastWhile { it != '.' }
     val nameWithoutExtension: String
@@ -18,7 +18,7 @@ value class FileName(val string: String) {
             } ?: filename
         }
     val withoutSlashAtTheEnd: String
-        get() = string.dropLastWhile { it == '/' }
+        get() = string.dropLastWhile { it == MPPFilePathSeparator }
     override fun toString(): String = string
 }
 
@@ -26,6 +26,7 @@ value class FileName(val string: String) {
 expect class MPPFile
 
 expect val MPPFile.filename: FileName
+expect val MPPFilePathSeparator: Char
 expect val MPPFile.filesize: Long
 expect val MPPFile.bytesAllocatorSync: ByteArrayAllocator
 expect val MPPFile.bytesAllocator: SuspendByteArrayAllocator
diff --git a/common/src/jsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt b/common/src/jsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt
index 7e3d865bfb6..807f613e816 100644
--- a/common/src/jsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt
+++ b/common/src/jsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt
@@ -35,6 +35,10 @@ private suspend fun MPPFile.dirtyReadBytes(): ByteArray = readBytesPromise().awa
  */
 actual val MPPFile.filename: FileName
     get() = FileName(name)
+
+actual val MPPFilePathSeparator: Char
+    get() = '/'
+
 /**
  * @suppress
  */
diff --git a/common/src/jvmMain/kotlin/dev/inmo/micro_utils/common/JVMMPPFile.kt b/common/src/jvmMain/kotlin/dev/inmo/micro_utils/common/JVMMPPFile.kt
index e245fe93836..c0a0055e8b6 100644
--- a/common/src/jvmMain/kotlin/dev/inmo/micro_utils/common/JVMMPPFile.kt
+++ b/common/src/jvmMain/kotlin/dev/inmo/micro_utils/common/JVMMPPFile.kt
@@ -14,6 +14,10 @@ actual typealias MPPFile = File
  */
 actual val MPPFile.filename: FileName
     get() = FileName(name)
+
+actual val MPPFilePathSeparator: Char
+    get() = File.separatorChar
+
 /**
  * @suppress
  */
diff --git a/common/src/nativeMain/kotlin/ActualMPPFile.kt b/common/src/nativeMain/kotlin/ActualMPPFile.kt
index ff5f9619c53..1a28a144be2 100644
--- a/common/src/nativeMain/kotlin/ActualMPPFile.kt
+++ b/common/src/nativeMain/kotlin/ActualMPPFile.kt
@@ -11,6 +11,10 @@ actual typealias MPPFile = Path
  */
 actual val MPPFile.filename: FileName
     get() = FileName(toString())
+
+
+actual val MPPFilePathSeparator: Char = Path.DIRECTORY_SEPARATOR.first()
+
 /**
  * @suppress
  */
diff --git a/common/src/wasmJsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt b/common/src/wasmJsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt
index cd5ad68ae73..2bf8f16fb36 100644
--- a/common/src/wasmJsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt
+++ b/common/src/wasmJsMain/kotlin/dev/inmo/micro_utils/common/JSMPPFile.kt
@@ -37,6 +37,10 @@ private suspend fun MPPFile.dirtyReadBytes(): ByteArray = readBytesPromise().awa
  */
 actual val MPPFile.filename: FileName
     get() = FileName(name)
+
+actual val MPPFilePathSeparator: Char
+    get() = '/'
+
 /**
  * @suppress
  */