diff --git a/src/CliProgram/AutoPrefix/AutoPrefixNamespaceManager.php b/src/CliProgram/AutoPrefix/AutoPrefixNamespaceManager.php
index 3a51e3f..134dc2f 100644
--- a/src/CliProgram/AutoPrefix/AutoPrefixNamespaceManager.php
+++ b/src/CliProgram/AutoPrefix/AutoPrefixNamespaceManager.php
@@ -48,6 +48,10 @@ class AutoPrefixNamespaceManager implements IAutoPrefixManager {
         if (mb_substr($namespace, 0, 1) !== '\\') {
             $namespace = '\\' . $namespace;
         }
+        if (mb_substr($namespace, -1) === '\\') {
+            $namespace = mb_substr($namespace, 0, -1);
+        }
+
         $this->namespace = $namespace;
         return $this;
     }