diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 3487963c6..60d908829 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -15181,3 +15181,10 @@ groups:
     func: DEFINE_func_80181E58
     vram: 0x80181E58
     binaries: [ov_SC03_118, ov_SC03_119]
+  - id: E_func_8018178C
+    tier: h_exact
+    hash: 5b1ba7c9b95e24199d97df754d49bcdc8e9ac9c2
+    source: src/shared/engine_core.h
+    func: DEFINE_func_8018178C
+    vram: 0x8018178C
+    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 d1a2a9aa7..7a67eddb0 100644
--- a/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
+++ b/src/ov_SC04_018/ov_SC04_018_jr_8017AE2C.c
@@ -5868,12 +5868,7 @@ extern void func_80184CB8(s32*, s32);
 INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_8017AE2C", func_80181738);
 
 
-extern void func_80184CB8(s32*, s32);
-    extern short D_80191B34;
-    void func_8018178C(void * arg0) {
-        *(short *)((char *)arg0 + 0x2) = 9;
-        ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80191B34);
-    }
+DEFINE_func_8018178C()  /* dedup: shared engine-core @0x8018178C (src/shared) */
 
 
 INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_8017AE2C", func_801817B8);
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 f8243c937..5fe18d649 100644
--- a/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
+++ b/src/ov_SC04_019/ov_SC04_019_jr_8017AE2C.c
@@ -5822,12 +5822,7 @@ extern void func_80184CB8(s32*, s32);
 INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_8017AE2C", func_80181738);
 
 
-extern void func_80184CB8(s32*, s32);
-    extern short D_80191B34;
-    void func_8018178C(void * arg0) {
-        *(short *)((char *)arg0 + 0x2) = 9;
-        ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80191B34);
-    }
+DEFINE_func_8018178C()  /* dedup: shared engine-core @0x8018178C (src/shared) */
 
 
 INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_8017AE2C", func_801817B8);
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index dd69d617e..260f5bb2f 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -65722,6 +65722,14 @@
         func_8012AD44((s32 *)self, 9); \
     }
 
+#define DEFINE_func_8018178C() \
+    extern void func_80184CB8(s32*, s32); \
+        extern short D_80191B34; \
+        void func_8018178C(void * arg0) { \
+            *(short *)((char *)arg0 + 0x2) = 9; \
+            ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80191B34); \
+        }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -160849,4 +160857,12 @@
         func_8012AD44((s32 *)self, 9); \
     }
 
+#define DEFINE_func_8018178C() \
+    extern void func_80184CB8(s32*, s32); \
+        extern short D_80191B34; \
+        void func_8018178C(void * arg0) { \
+            *(short *)((char *)arg0 + 0x2) = 9; \
+            ((void (*)(s32, s32))func_80184CB8)((int)arg0, (int)&D_80191B34); \
+        }
+
 #endif