diff --git a/gsplat/cuda/csrc/forward.cu b/gsplat/cuda/csrc/forward.cu
index c737bd54a..48221e7b0 100644
--- a/gsplat/cuda/csrc/forward.cu
+++ b/gsplat/cuda/csrc/forward.cu
@@ -277,7 +277,11 @@ void bin_and_sort_gaussians(
 
     // sort intersections by ascending tile ID and depth with RadixSort
     int32_t max_tile_id = (int32_t)(tile_bounds.x * tile_bounds.y);
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32) && !defined(__CYGWIN__)
+    int msb = 32 - __lzcnt(max_tile_id) + 1;
+#else
     int msb = 32 - __builtin_clz(max_tile_id) + 1;
+#endif
     // allocate workspace memory
     void *sort_ws = nullptr;
     size_t sort_ws_bytes;
@@ -662,7 +666,7 @@ __device__ float3 project_cov3d_ewa(
     glm::mat3 cov = T * V * glm::transpose(T);
 
     // add a little blur along axes and save upper triangular elements
-    return float3(float(cov[0][0]) + 0.3f, float(cov[0][1]), float(cov[1][1]) + 0.3f);
+    return make_float3(float(cov[0][0]) + 0.3f, float(cov[0][1]), float(cov[1][1]) + 0.3f);
 }
 
 // device helper to get 3D covariance from scale and quat parameters