diff --git a/src/libslic3r/Fill/Fill.cpp b/src/libslic3r/Fill/Fill.cpp
index 595a47a18..313bf9692 100644
--- a/src/libslic3r/Fill/Fill.cpp
+++ b/src/libslic3r/Fill/Fill.cpp
@@ -377,8 +377,10 @@ void export_group_fills_to_svg(const char *path, const std::vector<SurfaceFill>
 // friend to Layer
 void Layer::make_fills(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive::Octree* support_fill_octree)
 {
-    for (LayerRegion *layerm : m_regions)
+    for (LayerRegion* layerm : m_regions) {
         layerm->fills.clear();
+        layerm->ironings.clear();
+    }
 
 
 #ifdef SLIC3R_DEBUG_SLICE_PROCESSING
diff --git a/src/libslic3r/Layer.cpp b/src/libslic3r/Layer.cpp
index c42bde7d0..905d97fcc 100644
--- a/src/libslic3r/Layer.cpp
+++ b/src/libslic3r/Layer.cpp
@@ -127,6 +127,7 @@ void Layer::make_perimeters()
       if ((*layerm)->slices().empty()) {
           (*layerm)->perimeters.clear();
           (*layerm)->fills.clear();
+          (*layerm)->ironings.clear();
           (*layerm)->thin_fills.clear();
       } else {
         size_t region_id = layerm - m_regions.begin();
diff --git a/src/libslic3r/Layer.hpp b/src/libslic3r/Layer.hpp
index a7a78c068..49d75e5e0 100644
--- a/src/libslic3r/Layer.hpp
+++ b/src/libslic3r/Layer.hpp
@@ -86,7 +86,7 @@ public:
     void    export_region_fill_surfaces_to_svg_debug(const char *name) const;
 
     // Is there any valid extrusion assigned to this LayerRegion?
-    bool    has_extrusions() const { return !this->perimeters.entities.empty() || !this->fills.entities.empty() || !this->ironings.entities.empty(); }
+    bool    has_extrusions() const { return !this->perimeters.entities.empty() || !this->fills.entities.empty() || !this->ironings.entities.empty() || !this->thin_fills.entities.empty(); }
 
 protected:
     friend class Layer;