diff --git a/lib/Slic3r/Fill.pm b/lib/Slic3r/Fill.pm
index 4547a846b..5d2f4c31f 100644
--- a/lib/Slic3r/Fill.pm
+++ b/lib/Slic3r/Fill.pm
@@ -232,7 +232,7 @@ sub make_fill {
     
             my $extrusion_height = $is_bridge ? $flow->width : $h;
             
-            push @fills, my $collection = Slic3r::ExtrusionPath::Collection->new($role);
+            push @fills, my $collection = Slic3r::ExtrusionPath::Collection->new;
             $collection->no_sort($params->{no_sort});
             $collection->append(
                 map Slic3r::ExtrusionPath->new(
@@ -250,7 +250,7 @@ sub make_fill {
     
     # add thin fill regions
     foreach my $thin_fill (@{$layerm->thin_fills}) {
-        push @fills, Slic3r::ExtrusionPath::Collection->new($thin_fill->role, $thin_fill);
+        push @fills, Slic3r::ExtrusionPath::Collection->new($thin_fill);
         push @fills_ordering_points, $thin_fill->first_point;
     }
     
diff --git a/lib/Slic3r/Layer/Region.pm b/lib/Slic3r/Layer/Region.pm
index bc09f77ca..06345ac86 100644
--- a/lib/Slic3r/Layer/Region.pm
+++ b/lib/Slic3r/Layer/Region.pm
@@ -246,7 +246,7 @@ sub make_perimeters {
         my ($polynodes, $depth, $is_contour) = @_;
         
         # convert all polynodes to ExtrusionLoop objects
-        my $collection = Slic3r::ExtrusionPath::Collection->new(EXTR_ROLE_PERIMETER);  # temporary collection
+        my $collection = Slic3r::ExtrusionPath::Collection->new;  # temporary collection
         my @children = ();
         foreach my $polynode (@$polynodes) {
             my $polygon = ($polynode->{outer} // $polynode->{hole})->clone;
@@ -303,7 +303,7 @@ sub make_perimeters {
                 # (clone because the collection gets DESTROY'ed)
                 # We allow polyline reversal because Clipper may have randomly
                 # reversed polylines during clipping.
-                my $collection = Slic3r::ExtrusionPath::Collection->new(EXTR_ROLE_PERIMETER, @paths); # temporary collection
+                my $collection = Slic3r::ExtrusionPath::Collection->new(@paths); # temporary collection
                 @paths = map $_->clone, @{$collection->chained_path(0)};
             } else {
                 push @paths, Slic3r::ExtrusionPath->new(
diff --git a/t/fill.t b/t/fill.t
index 15f693a66..24370b660 100644
--- a/t/fill.t
+++ b/t/fill.t
@@ -146,7 +146,6 @@ sub scale_points (@) { map [scale $_->[X], scale $_->[Y]], @_ }
 
 {
     my $collection = Slic3r::ExtrusionPath::Collection->new(
-        EXTR_ROLE_PERIMETER,
         map Slic3r::ExtrusionPath->new(polyline => $_, role => 0, mm3_per_mm => 1),
             Slic3r::Polyline->new([0,15], [0,18], [0,20]),
             Slic3r::Polyline->new([0,10], [0,8], [0,5]),
@@ -159,7 +158,6 @@ sub scale_points (@) { map [scale $_->[X], scale $_->[Y]], @_ }
 
 {
     my $collection = Slic3r::ExtrusionPath::Collection->new(
-        EXTR_ROLE_PERIMETER,
         map Slic3r::ExtrusionPath->new(polyline => $_, role => 0, mm3_per_mm => 1),
             Slic3r::Polyline->new([15,0], [10,0], [4,0]),
             Slic3r::Polyline->new([10,5], [15,5], [20,5]),
diff --git a/xs/lib/Slic3r/XS.pm b/xs/lib/Slic3r/XS.pm
index 08bb625cb..9ac0b35e9 100644
--- a/xs/lib/Slic3r/XS.pm
+++ b/xs/lib/Slic3r/XS.pm
@@ -64,9 +64,9 @@ use overload
     'fallback' => 1;
 
 sub new {
-    my ($class, $type, @paths) = @_;
+    my ($class, @paths) = @_;
     
-    my $self = $class->_new($type);
+    my $self = $class->_new;
     $self->append(@paths);
     return $self;
 }
diff --git a/xs/src/libslic3r/ExtrusionEntityCollection.cpp b/xs/src/libslic3r/ExtrusionEntityCollection.cpp
index 89748bc86..a958e53cf 100644
--- a/xs/src/libslic3r/ExtrusionEntityCollection.cpp
+++ b/xs/src/libslic3r/ExtrusionEntityCollection.cpp
@@ -5,7 +5,7 @@
 namespace Slic3r {
 
 ExtrusionEntityCollection::ExtrusionEntityCollection(const ExtrusionEntityCollection& collection)
-    : no_sort(collection.no_sort), role(collection.role), orig_indices(collection.orig_indices)
+    : no_sort(collection.no_sort), orig_indices(collection.orig_indices)
 {
     this->entities.reserve(collection.entities.size());
     for (ExtrusionEntitiesPtr::const_iterator it = collection.entities.begin(); it != collection.entities.end(); ++it)
@@ -23,7 +23,6 @@ void
 ExtrusionEntityCollection::swap (ExtrusionEntityCollection &c)
 {
     std::swap(this->entities, c.entities);
-    std::swap(this->role, c.role);
     std::swap(this->orig_indices, c.orig_indices);
     std::swap(this->no_sort, c.no_sort);
 }
diff --git a/xs/src/libslic3r/ExtrusionEntityCollection.hpp b/xs/src/libslic3r/ExtrusionEntityCollection.hpp
index a72563f47..bc660611b 100644
--- a/xs/src/libslic3r/ExtrusionEntityCollection.hpp
+++ b/xs/src/libslic3r/ExtrusionEntityCollection.hpp
@@ -13,9 +13,7 @@ class ExtrusionEntityCollection : public ExtrusionEntity
     ExtrusionEntitiesPtr entities;
     std::vector<size_t> orig_indices;  // handy for XS
     bool no_sort;
-    ExtrusionRole role;
     ExtrusionEntityCollection(): no_sort(false) {};
-    ExtrusionEntityCollection(ExtrusionRole _role): no_sort(false), role(_role) {};
     ExtrusionEntityCollection(const ExtrusionEntityCollection &collection);
     ExtrusionEntityCollection& operator= (const ExtrusionEntityCollection &other);
     void swap (ExtrusionEntityCollection &c);
diff --git a/xs/t/12_extrusionpathcollection.t b/xs/t/12_extrusionpathcollection.t
index 7349ca941..73608cba7 100644
--- a/xs/t/12_extrusionpathcollection.t
+++ b/xs/t/12_extrusionpathcollection.t
@@ -27,7 +27,6 @@ my $loop = Slic3r::ExtrusionLoop->new_from_paths(
 );
 
 my $collection = Slic3r::ExtrusionPath::Collection->new(
-    Slic3r::ExtrusionPath::EXTR_ROLE_FILL,
     $path,
 );
 isa_ok $collection, 'Slic3r::ExtrusionPath::Collection', 'collection object with items in constructor';
@@ -58,7 +57,6 @@ is scalar(@{$collection->[1]}), 1, 'appended collection was duplicated';
 
 {
     my $collection = Slic3r::ExtrusionPath::Collection->new(
-        Slic3r::ExtrusionPath::EXTR_ROLE_FILL,
         map Slic3r::ExtrusionPath->new(polyline => $_, role => 0, mm3_per_mm => 1),
             Slic3r::Polyline->new([0,15], [0,18], [0,20]),
             Slic3r::Polyline->new([0,10], [0,8], [0,5]),
@@ -75,7 +73,6 @@ is scalar(@{$collection->[1]}), 1, 'appended collection was duplicated';
 
 {
     my $collection = Slic3r::ExtrusionPath::Collection->new(
-        Slic3r::ExtrusionPath::EXTR_ROLE_FILL,
         map Slic3r::ExtrusionPath->new(polyline => $_, role => 0, mm3_per_mm => 1),
             Slic3r::Polyline->new([15,0], [10,0], [4,0]),
             Slic3r::Polyline->new([10,5], [15,5], [20,5]),
diff --git a/xs/xsp/ExtrusionEntityCollection.xsp b/xs/xsp/ExtrusionEntityCollection.xsp
index 290bcea50..fa1d26eed 100644
--- a/xs/xsp/ExtrusionEntityCollection.xsp
+++ b/xs/xsp/ExtrusionEntityCollection.xsp
@@ -6,7 +6,7 @@
 %}
 
 %name{Slic3r::ExtrusionPath::Collection} class ExtrusionEntityCollection {
-    %name{_new} ExtrusionEntityCollection(ExtrusionRole role);
+    %name{_new} ExtrusionEntityCollection();
     void reverse();
     void clear()
         %code{% THIS->entities.clear(); %};