diff --git a/src/libslic3r/SLA/SLAAutoSupports.cpp b/src/libslic3r/SLA/SLAAutoSupports.cpp
index 91b7dfe5d..78efd0806 100644
--- a/src/libslic3r/SLA/SLAAutoSupports.cpp
+++ b/src/libslic3r/SLA/SLAAutoSupports.cpp
@@ -386,7 +386,7 @@ static inline std::vector<Vec2f> poisson_disk_from_samples(const std::vector<Vec
             } else {
                 // This is a new cell.
                 PoissonDiskGridEntry data;
-                data.first_sample_idx = i;
+                data.first_sample_idx = int(i);
                 data.sample_cnt       = 1;
                 auto result     = cells.insert({sample.cell_id, data});
                 last_cell_id    = sample.cell_id;
diff --git a/src/libslic3r/SLA/SLASupportTreeIGL.cpp b/src/libslic3r/SLA/SLASupportTreeIGL.cpp
index 4b6498a20..d48b5bf73 100644
--- a/src/libslic3r/SLA/SLASupportTreeIGL.cpp
+++ b/src/libslic3r/SLA/SLASupportTreeIGL.cpp
@@ -12,10 +12,18 @@
 #include "SLABoostAdapter.hpp"
 #include "boost/geometry/index/rtree.hpp"
 
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4244)
+#pragma warning(disable: 4267)
+#endif
 #include <igl/ray_mesh_intersect.h>
 #include <igl/point_mesh_squared_distance.h>
 #include <igl/remove_duplicate_vertices.h>
 #include <igl/signed_distance.h>
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
 
 #include <tbb/parallel_for.h>