diff --git a/src/openrct2/rct1/S4Importer.cpp b/src/openrct2/rct1/S4Importer.cpp
index 3960bf1c8d..a7926ee626 100644
--- a/src/openrct2/rct1/S4Importer.cpp
+++ b/src/openrct2/rct1/S4Importer.cpp
@@ -2728,7 +2728,7 @@ namespace OpenRCT2::RCT1
             case RCT12EntityIdentifier::peep:
             {
                 const auto& peep = static_cast<const RCT1::Peep&>(src);
-                if (peep.PeepType == RCT12PeepType::Guest)
+                if (peep.PeepType == RCT12PeepType::guest)
                 {
                     output = EntityType::guest;
                 }
diff --git a/src/openrct2/rct12/RCT12.h b/src/openrct2/rct12/RCT12.h
index 5f624db1a0..3baf244315 100644
--- a/src/openrct2/rct12/RCT12.h
+++ b/src/openrct2/rct12/RCT12.h
@@ -933,10 +933,10 @@ enum class RCT12MiscEntityType : uint8_t
 
 enum class RCT12PeepType : uint8_t
 {
-    Guest,
-    Staff,
+    guest,
+    staff,
 
-    Invalid = 0xFF
+    invalid = 0xFF
 };
 
 enum class RCT12PeepAnimationGroup : uint8_t
diff --git a/src/openrct2/rct2/S6Importer.cpp b/src/openrct2/rct2/S6Importer.cpp
index 2491cd8ce4..30fdbc81b5 100644
--- a/src/openrct2/rct2/S6Importer.cpp
+++ b/src/openrct2/rct2/S6Importer.cpp
@@ -1744,7 +1744,7 @@ namespace OpenRCT2::RCT2
                 case RCT12EntityIdentifier::peep:
                 {
                     const auto& peep = static_cast<const Peep&>(*src);
-                    if (RCT12PeepType(peep.PeepType) == RCT12PeepType::Guest)
+                    if (RCT12PeepType(peep.PeepType) == RCT12PeepType::guest)
                     {
                         output = EntityType::guest;
                     }