diff --git a/BGL/examples/BGL/borders.cpp b/BGL/examples/BGL/borders.cpp
index 0d4c47b25a9..e2c848718f9 100644
--- a/BGL/examples/BGL/borders.cpp
+++ b/BGL/examples/BGL/borders.cpp
@@ -93,7 +93,7 @@ int main()
        std::cout << "POLYLINE" << std::endl;
        n = poly.size();
      }
-     for(int j=0; j < n; j++){
+     for(std::size_t j=0; j < n; j++){
        std::cout << poly[j] << std::endl;
      }
      std::cout << std::endl;
diff --git a/BGL/examples/BGL/split.cpp b/BGL/examples/BGL/split.cpp
index a320ac7b1b7..28f547e39ff 100644
--- a/BGL/examples/BGL/split.cpp
+++ b/BGL/examples/BGL/split.cpp
@@ -103,7 +103,7 @@ int main()
        std::cout << "POLYLINE" << std::endl;
        n = poly.size();
      }
-     for(int j=0; j < n; j++){
+     for(std::size_t j=0; j < n; j++){
        std::cout << poly[j] << std::endl;
      }
      std::cout << std::endl;