diff --git a/include/functions.h b/include/functions.h
index 9bcdfabb0d..d8a26ccbef 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -760,7 +760,7 @@ void func_800B722C(void); // func_800B722C
 UNK_TYPE4 func_800B724C(GlobalContext* ctxt, UNK_TYPE4 param_2, u8 param_3); // func_800B724C
 unsigned int func_800B7298(GlobalContext* ctxt, UNK_TYPE4 param_2, u8 param_3); // func_800B7298
 void func_800B72E0(s32 param_1); // func_800B72E0
-void func_800B72F8(void); // func_800B72F8
+void func_800B72F8(DynaPolyActor* dpactor, f32 a1, s16 a2); // func_800B72F8
 s32 Actor_IsLinkFacingActor(Actor* actor, s16 tolerance, GlobalContext* ctxt); // func_800B7320
 s32 Actor_IsActorFacedByActor(Actor* actor, Actor* other, s16 tolerance); // func_800B7378
 s32 Actor_IsActorFacingLink(Actor* actor, s16 angle); // func_800B73E0
diff --git a/include/structs.h b/include/structs.h
index 9b69e69376..70d7f20858 100644
--- a/include/structs.h
+++ b/include/structs.h
@@ -3076,7 +3076,8 @@ struct DynaPolyActor {
 /* 0x144 */ s32 dynaPolyId;
 /* 0x148 */ f32 unk148;
 /* 0x14C */ f32 unk14C;
-/* 0x150 */ UNK_TYPE4 unk150;
+/* 0x150 */ s16 unk150;
+/* 0x152 */ s16 unk152;
 /* 0x154 */ u32 unk154;
 /* 0x158 */ u8 dynaFlags;
 /* 0x159 */ UNK_TYPE1 pad159[0x3];
diff --git a/src/code/z_actor.c b/src/code/z_actor.c
index c792a6b1ea..595ae4882f 100644
--- a/src/code/z_actor.c
+++ b/src/code/z_actor.c
@@ -405,7 +405,10 @@ GLOBAL_ASM("asm/non_matchings/z_actor//func_800B7298.asm")
 
 GLOBAL_ASM("asm/non_matchings/z_actor//func_800B72E0.asm")
 
-GLOBAL_ASM("asm/non_matchings/z_actor//func_800B72F8.asm")
+void func_800B72F8(DynaPolyActor* dpactor, f32 a1, s16 a2) {
+    dpactor->unk150 = a2;
+    dpactor->unk148 += a1;
+}
 
 GLOBAL_ASM("asm/non_matchings/z_actor//Actor_IsLinkFacingActor.asm")