diff --git a/src/autoload.php b/src/autoload.php
index 8b0a678c..76bd64e0 100644
--- a/src/autoload.php
+++ b/src/autoload.php
@@ -10,6 +10,12 @@
 use Psr\Container\ContainerInterface;
 use Psr\Container\NotFoundExceptionInterface;
 
-class_alias(ContainerInterface::class, InteropContainerInterface::class);
-class_alias(ContainerExceptionInterface::class, InteropContainerException::class);
-class_alias(NotFoundExceptionInterface::class, InteropNotFoundException::class);
+if (! interface_exists(InteropContainerInterface::class, false)) {
+    class_alias(ContainerInterface::class, InteropContainerInterface::class);
+}
+if (! interface_exists(InteropContainerException::class, false)) {
+    class_alias(ContainerExceptionInterface::class, InteropContainerException::class);
+}
+if (! interface_exists(InteropNotFoundException::class, false)) {
+    class_alias(NotFoundExceptionInterface::class, InteropNotFoundException::class);
+}