diff --git a/src/Psalm/Internal/Codebase/ClassLikes.php b/src/Psalm/Internal/Codebase/ClassLikes.php
index cb6882623df..9a78716c0dc 100644
--- a/src/Psalm/Internal/Codebase/ClassLikes.php
+++ b/src/Psalm/Internal/Codebase/ClassLikes.php
@@ -188,7 +188,7 @@ private function collectPredefinedClassLikes(): void
             /** @psalm-suppress ArgumentTypeCoercion */
             $reflection_class = new ReflectionClass($predefined_class);
 
-            if (!$reflection_class->isUserDefined()) {
+            if (!$reflection_class->isUserDefined() && $reflection_class->name === $predefined_class) {
                 $predefined_class_lc = strtolower($predefined_class);
                 $this->existing_classlikes_lc[$predefined_class_lc] = true;
                 $this->existing_classes_lc[$predefined_class_lc] = true;
@@ -204,7 +204,7 @@ private function collectPredefinedClassLikes(): void
             /** @psalm-suppress ArgumentTypeCoercion */
             $reflection_class = new ReflectionClass($predefined_interface);
 
-            if (!$reflection_class->isUserDefined()) {
+            if (!$reflection_class->isUserDefined() && $reflection_class->name === $predefined_interface) {
                 $predefined_interface_lc = strtolower($predefined_interface);
                 $this->existing_classlikes_lc[$predefined_interface_lc] = true;
                 $this->existing_interfaces_lc[$predefined_interface_lc] = true;