diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 2f8737572..34f6c2471 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14614,3 +14614,10 @@ groups:
     func: DEFINE_func_8017E5CC
     vram: 0x8017E5CC
     binaries: [ov_SC04_018, ov_SC04_019]
+  - id: E_func_8018B158
+    tier: h_exact
+    hash: d5ee5732b43b65de197ee366b6abe1257a55c86d
+    source: src/shared/engine_core.h
+    func: DEFINE_func_8018B158
+    vram: 0x8018B158
+    binaries: [ov_SC04_018, ov_SC04_019]
diff --git a/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c b/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c
index 6ce254e52..3f02db314 100644
--- a/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c
+++ b/src/ov_SC04_018/ov_SC04_018_jr_80188E1C.c
@@ -4462,15 +4462,7 @@ INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_80188E1C", func_8018AFF
 
 INCLUDE_ASM("asm/ov_SC04_018/nonmatchings/ov_SC04_018_jr_80188E1C", func_8018B0AC);
 
-extern void func_8012E8E0(s32 a0, s32 a1);
-extern u8 D_801E04F8[];
-
-void func_8018B158(s32 a0) {
-    *(s16 *)(a0 + 0x2) = 1;
-    func_8012E8E0(a0, (s32)&D_801E04F8);
-    *(s16 *)(a0 + 0xFE) = 0;
-    *(s16 *)(a0 + 0xFC) = 0x80;
-}
+DEFINE_func_8018B158()  /* dedup: shared engine-core @0x8018B158 (src/shared) */
 
 
 /*
diff --git a/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c b/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c
index 908afea2f..5eecf98a7 100644
--- a/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c
+++ b/src/ov_SC04_019/ov_SC04_019_jr_80188E1C.c
@@ -3890,7 +3890,7 @@ INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_80188E1C", func_8018AFF
 
 INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_80188E1C", func_8018B0AC);
 
-INCLUDE_ASM("asm/ov_SC04_019/nonmatchings/ov_SC04_019_jr_80188E1C", func_8018B158);
+DEFINE_func_8018B158()  /* dedup: shared engine-core @0x8018B158 (src/shared) */
 
 extern void func_8012B200(u8 *a0);
 
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 0b4318ab1..0b6b48b7e 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -60540,6 +60540,16 @@
         func_80184C90((s32)arg0); \
     }
 
+#define DEFINE_func_8018B158() \
+    extern void func_8012E8E0(s32 a0, s32 a1); \
+    extern u8 D_801E04F8[]; \
+    void func_8018B158(s32 a0) { \
+        *(s16 *)(a0 + 0x2) = 1; \
+        func_8012E8E0(a0, (s32)&D_801E04F8); \
+        *(s16 *)(a0 + 0xFE) = 0; \
+        *(s16 *)(a0 + 0xFC) = 0x80; \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -150485,4 +150495,14 @@
         func_80184C90((s32)arg0); \
     }
 
+#define DEFINE_func_8018B158() \
+    extern void func_8012E8E0(s32 a0, s32 a1); \
+    extern u8 D_801E04F8[]; \
+    void func_8018B158(s32 a0) { \
+        *(s16 *)(a0 + 0x2) = 1; \
+        func_8012E8E0(a0, (s32)&D_801E04F8); \
+        *(s16 *)(a0 + 0xFE) = 0; \
+        *(s16 *)(a0 + 0xFC) = 0x80; \
+    }
+
 #endif