diff --git a/src/games/stratspt.cc b/src/games/stratspt.cc
index 0adcfedea..97752ad82 100644
--- a/src/games/stratspt.cc
+++ b/src/games/stratspt.cc
@@ -244,10 +244,10 @@ Iterator find_minimal_elements(Iterator first, Iterator last, Comparator greater
   return min;
 }
 
-}  // end anonymous namespace
+} // end anonymous namespace
 
-
-bool UndominatedForPlayer(StrategySupportProfile &p_support, const GamePlayer &p_player,
+bool UndominatedForPlayer(const StrategySupportProfile &p_support,
+                          StrategySupportProfile &p_newSupport, const GamePlayer &p_player,
                           bool p_strict, bool p_external)
 {
   std::vector<GameStrategy> set((p_external) ? p_player->NumStrategies()
@@ -260,26 +260,25 @@ bool UndominatedForPlayer(StrategySupportProfile &p_support, const GamePlayer &p
     auto strategies = p_support.GetStrategies(p_player);
     std::copy(strategies.begin(), strategies.end(), set.begin());
   }
-  auto min = find_minimal_elements(set.begin(), set.end(),
-                                   [&p_support, p_strict](const GameStrategy &s, const GameStrategy &t) {
-                                     return p_support.Dominates(s, t, p_strict);
-                                   });
+  auto min =
+      find_minimal_elements(set.begin(), set.end(),
+                            [&p_support, p_strict](const GameStrategy &s, const GameStrategy &t) {
+                              return p_support.Dominates(s, t, p_strict);
+                            });
 
   for (auto s = min; s != set.end(); s++) {
-    p_support.RemoveStrategy(*s);
+    p_newSupport.RemoveStrategy(*s);
   }
   return min != set.end();
 }
 
 StrategySupportProfile StrategySupportProfile::Undominated(bool p_strict, bool p_external) const
 {
-  StrategySupportProfile newS(*this);
-
+  StrategySupportProfile newSupport(*this);
   for (auto player : m_nfg->GetPlayers()) {
-    UndominatedForPlayer(newS, player, p_strict, p_external);
+    UndominatedForPlayer(*this, newSupport, player, p_strict, p_external);
   }
-
-  return newS;
+  return newSupport;
 }
 
 //---------------------------------------------------------------------------