diff --git a/src/libslic3r/ExtrusionEntity.hpp b/src/libslic3r/ExtrusionEntity.hpp
index 02371a549..55201843a 100644
--- a/src/libslic3r/ExtrusionEntity.hpp
+++ b/src/libslic3r/ExtrusionEntity.hpp
@@ -39,7 +39,7 @@ enum ExtrusionRole : uint8_t {
 
 // Special flags describing loop
 enum ExtrusionLoopRole : uint16_t {
-    elrDefault = 0,
+    elrDefault = 1 << 0, //1
     // doesn't contains more contour: it's the most internal one
     elrInternal = 1 << 1, //2
     elrSkirt =    1 << 2,  //4
diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index eecf34c86..5cfdd5f71 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -2664,7 +2664,7 @@ std::string GCode::extrude_loop_vase(const ExtrusionLoop &original_loop, const s
 
     // extrude all loops ccw
     //no! this was decided in perimeter_generator
-    bool is_hole_loop = loop.loop_role() & ExtrusionLoopRole::elrHole != 0;// loop.make_counter_clockwise();
+    bool is_hole_loop = (loop.loop_role() & ExtrusionLoopRole::elrHole) != 0;// loop.make_counter_clockwise();
     bool reverse_turn = loop.polygon().is_clockwise() ^ is_hole_loop;
 
     split_at_seam_pos(loop, lower_layer_edge_grid);
@@ -3055,7 +3055,7 @@ void GCode::split_at_seam_pos(ExtrusionLoop &loop, std::unique_ptr<EdgeGrid::Gri
             loop.split_at(polygon.points[idx_min], true);
 
     } else if (seam_position == spRandom) {
-        if (loop.loop_role() & elrInternal == 0) {
+        if ( (loop.loop_role() & elrInternal) == 0) {
             // This loop does not contain any other (not-hole) loop. Set a random position.
             // The other loops will get a seam close to the random point chosen
             // on the inner most contour.