diff --git a/CInterface/Battling/BattleParty.cpp b/CInterface/Battling/BattleParty.cpp
index e402dfc..dd40f29 100644
--- a/CInterface/Battling/BattleParty.cpp
+++ b/CInterface/Battling/BattleParty.cpp
@@ -19,9 +19,3 @@ export uint8_t CreatureLib_BattleParty_IsResponsibleForIndex(bool& out, const Ba
 }
 
 export bool CreatureLib_BattleParty_HasCreaturesNotInField(const BattleParty* p) { return p->HasCreaturesNotInField(); }
-
-inline bool BattleParty::IsResponsibleForIndex(uint8_t side, uint8_t index) const {
-    return std::any_of(_responsibleIndices.begin(), _responsibleIndices.end(), [side, index](const CreatureIndex& ci) {
-        return ci.GetSideIndex() == side && ci.GetCreatureIndex() == index;
-    });
-}
diff --git a/src/Battling/Models/BattleParty.hpp b/src/Battling/Models/BattleParty.hpp
index 97d065b..672548a 100644
--- a/src/Battling/Models/BattleParty.hpp
+++ b/src/Battling/Models/BattleParty.hpp
@@ -24,7 +24,12 @@ namespace CreatureLib::Battling {
             return _responsibleIndices.Contains(index);
         }
 
-        bool IsResponsibleForIndex(uint8_t side, uint8_t index) const;
+        inline bool IsResponsibleForIndex(uint8_t side, uint8_t index) const {
+            return std::any_of(_responsibleIndices.begin(), _responsibleIndices.end(),
+                               [side, index](const CreatureIndex& ci) {
+                                   return ci.GetSideIndex() == side && ci.GetCreatureIndex() == index;
+                               });
+        }
 
         inline bool HasCreaturesNotInField() const {
             const auto& p = _party->GetParty();