diff --git a/src/openrct2/park/ParkFile.cpp b/src/openrct2/park/ParkFile.cpp
index 7e9e3f8747..f1564f05dc 100644
--- a/src/openrct2/park/ParkFile.cpp
+++ b/src/openrct2/park/ParkFile.cpp
@@ -910,7 +910,7 @@ namespace OpenRCT2
                         return true;
                     });
 
-                    if (version <= 36)
+                    if (version < k16BitParkHistoryVersion)
                     {
                         if (cs.GetMode() == OrcaStream::Mode::READING)
                         {
@@ -922,7 +922,7 @@ namespace OpenRCT2
                             for (int i = 0; i < kParkRatingHistorySize; i++)
                             {
                                 if (smallHistory[i] == RCT12ParkHistoryUndefined)
-                                    gameState.Park.RatingHistory[i] = ParkRatingHistoryUndefined;
+                                    gameState.Park.RatingHistory[i] = kParkRatingHistoryUndefined;
                                 else
                                 {
                                     gameState.Park.RatingHistory[i] = static_cast<uint16_t>(
@@ -935,7 +935,7 @@ namespace OpenRCT2
                             uint8_t smallHistory[kParkRatingHistorySize];
                             for (int i = 0; i < kParkRatingHistorySize; i++)
                             {
-                                if (gameState.Park.RatingHistory[i] == ParkRatingHistoryUndefined)
+                                if (gameState.Park.RatingHistory[i] == kParkRatingHistoryUndefined)
                                     smallHistory[i] = RCT12ParkHistoryUndefined;
                                 else
                                 {
diff --git a/src/openrct2/park/ParkFile.h b/src/openrct2/park/ParkFile.h
index 30e005c9b2..602e508085 100644
--- a/src/openrct2/park/ParkFile.h
+++ b/src/openrct2/park/ParkFile.h
@@ -11,10 +11,10 @@ namespace OpenRCT2
     struct GameState_t;
 
     // Current version that is saved.
-    constexpr uint32_t PARK_FILE_CURRENT_VERSION = 37;
+    constexpr uint32_t PARK_FILE_CURRENT_VERSION = 38;
 
     // The minimum version that is forwards compatible with the current version.
-    constexpr uint32_t PARK_FILE_MIN_VERSION = 33;
+    constexpr uint32_t PARK_FILE_MIN_VERSION = 38;
 
     // The minimum version that is backwards compatible with the current version.
     // If this is increased beyond 0, uncomment the checks in ParkFile.cpp and Context.cpp!
@@ -29,6 +29,7 @@ namespace OpenRCT2
     constexpr uint16_t kBlockBrakeImprovementsVersion = 27;
     constexpr uint16_t kGigaCoasterInversions = 31;
     constexpr uint16_t kWoodenFlatToSteepVersion = 37;
+    constexpr uint16_t k16BitParkHistoryVersion = 38;
 } // namespace OpenRCT2
 
 class ParkFileExporter