diff --git a/src/Managers/Vfs/VirtualFileSystem.h b/src/Managers/Vfs/VirtualFileSystem.h
index 0f3333c..a9e227e 100644
--- a/src/Managers/Vfs/VirtualFileSystem.h
+++ b/src/Managers/Vfs/VirtualFileSystem.h
@@ -37,7 +37,7 @@ class VirtualFileSystem: public VfsDirectory<FileType> {
         void build(Containers::ArrayView<FileType> files) {
             for(auto& file : files) {
                 auto components = file.filename.split('/');
-                CORRADE_INTERNAL_ASSERT(components.size() == 0);
+                CORRADE_INTERNAL_ASSERT(components.size() != 0);
 
                 VfsDirectory<FileType>::buildNestedPath(*this, components, file);
             }