diff --git a/src/Defines.hpp b/src/Defines.hpp
index fa8555a..fc782dc 100644
--- a/src/Defines.hpp
+++ b/src/Defines.hpp
@@ -16,6 +16,14 @@ const float CN_EP_RANK_3 = 0.5f;
 const float CN_EP_RANK_4 = 0.3f;
 const float CN_EP_RANK_5 = 0.29f;
 
+// NPC classes
+enum NPCClass {
+    NPC_BASE = 0,
+    NPC_MOB = 1,
+    NPC_BUS = 2,
+    NPC_EGG = 3
+};
+
 // nano powers
 enum {
     EST_NONE = 0,
diff --git a/src/NPC.hpp b/src/NPC.hpp
index 371d420..c2db348 100644
--- a/src/NPC.hpp
+++ b/src/NPC.hpp
@@ -5,6 +5,7 @@
 class BaseNPC {
 public:
     sNPCAppearanceData appearanceData;
+    NPCClass npcClass;
 
     BaseNPC() {};
     BaseNPC(int x, int y, int z, int type) {
@@ -20,4 +21,7 @@ public:
         // hopefully no collisions happen :eyes:
         appearanceData.iNPC_ID = (int32_t)rand();
     };
+    BaseNPC(int x, int y, int z, int type, NPCClass classType) : BaseNPC(x, y, z, type) {
+        npcClass = classType;
+    }
 };