diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JarGenerator.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JarGenerator.kt
index 9572a622..19bb52c6 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JarGenerator.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JarGenerator.kt
@@ -3,6 +3,7 @@ package com.beust.kobalt
 import com.beust.kobalt.api.KobaltContext
 import com.beust.kobalt.api.Project
 import com.beust.kobalt.archive.Archives
+import com.beust.kobalt.archive.MetaArchive
 import com.beust.kobalt.archive.Zip
 import com.beust.kobalt.maven.DependencyManager
 import com.beust.kobalt.maven.aether.Scope
@@ -141,7 +142,7 @@ class JarGenerator @Inject constructor(val dependencyManager: DependencyManager)
                     val allFiles = includedFiles.flatMap { file ->
                         file.allFromFiles(project.directory).map { file.from(it.path) }
                     }
-                    val manifestFiles = allFiles.filter { it.path.contains("META-INF/MANIFEST.MF") }
+                    val manifestFiles = allFiles.filter { it.path.contains(MetaArchive.MANIFEST_MF) }
                     return if (manifestFiles.any()) manifestFiles[0] else null
                 }
 
diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/archive/MetaArchive.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/archive/MetaArchive.kt
index 539ce238..d65f68f0 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/archive/MetaArchive.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/archive/MetaArchive.kt
@@ -18,6 +18,10 @@ import org.apache.commons.compress.archivers.zip.ZipFile as ApacheZipFile
  * Uses ZipArchiveOutputStream for fast inclusion of expanded jar files.
  */
 class MetaArchive(outputFile: File, val manifest: Manifest?) : Closeable {
+    companion object {
+        val MANIFEST_MF = "/META-INF/MANIFEST.MF"
+    }
+
     private val zos = ZipArchiveOutputStream(outputFile).apply {
         encoding = "UTF-8"
     }
@@ -60,7 +64,7 @@ class MetaArchive(outputFile: File, val manifest: Manifest?) : Closeable {
                     manifest.write(fos)
                 }
 
-                val entry = zos.createArchiveEntry(manifestFile, "META-INF/MANIFEST.MF")
+                val entry = zos.createArchiveEntry(manifestFile, MetaArchive.MANIFEST_MF)
                 addEntry(entry, FileInputStream(manifestFile))
             }
         }