diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 29a48e2b5..2377d04f7 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14411,3 +14411,10 @@ groups:
     func: DEFINE_func_80182A7C
     vram: 0x80182A7C
     binaries: [ov_SC04_018, ov_SC04_019]
+  - id: E_func_80183890
+    tier: h_exact
+    hash: 72636551710077cf5419b5f1ebd370347672a350
+    source: src/shared/engine_core.h
+    func: DEFINE_func_80183890
+    vram: 0x80183890
+    binaries: [ov_SC04_018, ov_SC04_019]
diff --git a/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c b/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
index 78646d2b5..16d12748e 100644
--- a/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
+++ b/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
@@ -6676,7 +6676,7 @@ INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_8017AE2C", func_801837E
 DEFINE_func_80183838()  /* dedup: shared engine-core @0x80183838 (src/shared) */
 
 
-INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_8017AE2C", func_80183890);
+DEFINE_func_80183890()  /* dedup: shared engine-core @0x80183890 (src/shared) */
 
 INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_8017AE2C", func_801838E0);
 
diff --git a/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c b/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
index dd725ca7f..ce705b3aa 100644
--- a/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
+++ b/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
@@ -6607,19 +6607,7 @@ DEFINE_func_80183838()  /* dedup: shared engine-core @0x80183838 (src/shared) */
 
 #include "common.h"
 
-extern int func_80178970(void);
-extern void func_80178D18(void);
-extern void func_80184CB8(s32*, s32);
-
-void func_80183890(void * arg0) {
-
-    extern short D_80192030;
-    if (func_80178970() != 0) {
-        ((void (*)(s32))func_80178D18)((s32)arg0);
-        *(short *)((char *)arg0 + 0x2) = 8;
-        ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80192030);
-    }
-}
+DEFINE_func_80183890()  /* dedup: shared engine-core @0x80183890 (src/shared) */
 
 
 INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_8017AE2C", func_801838E0);
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 5d73b1758..5a762339b 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -60078,6 +60078,19 @@
         } \
     }
 
+#define DEFINE_func_80183890() \
+    extern int func_80178970(void); \
+    extern void func_80178D18(void); \
+    extern void func_80184CB8(s32*, s32); \
+    void func_80183890(void * arg0) { \
+        extern short D_80192030; \
+        if (func_80178970() != 0) { \
+            ((void (*)(s32))func_80178D18)((s32)arg0); \
+            *(short *)((char *)arg0 + 0x2) = 8; \
+            ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80192030); \
+        } \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -149561,4 +149574,17 @@
         } \
     }
 
+#define DEFINE_func_80183890() \
+    extern int func_80178970(void); \
+    extern void func_80178D18(void); \
+    extern void func_80184CB8(s32*, s32); \
+    void func_80183890(void * arg0) { \
+        extern short D_80192030; \
+        if (func_80178970() != 0) { \
+            ((void (*)(s32))func_80178D18)((s32)arg0); \
+            *(short *)((char *)arg0 + 0x2) = 8; \
+            ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80192030); \
+        } \
+    }
+
 #endif