diff --git a/base/src/main/kotlin/de/staropensource/engine/base/implementation/stream/FileAccessStream.kt b/base/src/main/kotlin/de/staropensource/engine/base/implementation/stream/FileAccessStream.kt
index d52f451..e46451c 100644
--- a/base/src/main/kotlin/de/staropensource/engine/base/implementation/stream/FileAccessStream.kt
+++ b/base/src/main/kotlin/de/staropensource/engine/base/implementation/stream/FileAccessStream.kt
@@ -102,7 +102,12 @@ class FileAccessStream internal constructor(val file: FileAccess) : Stream(strea
                 .createFile()
                 .verifyIsFile()
 
-            return inputStream.read().toByte()
+            val byte: Int = inputStream.read()
+
+            return if (byte == -1)
+                null
+            else
+                byte.toByte()
         } catch (_: VerificationFailedException) {
             throw IOAccessException("File '${file}' does not exist")
         }