diff --git a/cpp/apps/primitives_gallery/main.cpp b/cpp/apps/primitives_gallery/main.cpp
index c0e72250..8cc3c517 100644
--- a/cpp/apps/primitives_gallery/main.cpp
+++ b/cpp/apps/primitives_gallery/main.cpp
@@ -176,8 +176,12 @@ int main(int argc, char** argv) {
                 return 2;
             }
             const char* out_dir = argv[i + 1];
-            // Best-effort mkdir (idempotente).
+            // Best-effort mkdir (idempotente). Windows mkdir() solo acepta el path.
+#if defined(_WIN32)
+            mkdir(out_dir);
+#else
             mkdir(out_dir, 0755);
+#endif
 
             std::vector<gallery::CaptureItem> items;
             items.reserve(k_demo_count);