diff --git a/config/dedup.us.yaml b/config/dedup.us.yaml
index 7a530286c..bd32480bc 100644
--- a/config/dedup.us.yaml
+++ b/config/dedup.us.yaml
@@ -14467,3 +14467,10 @@ groups:
     func: DEFINE_func_8017DCD8
     vram: 0x8017DCD8
     binaries: [ov_SC04_000, ov_SC04_004, ov_SC04_007]
+  - id: E_func_8017CCF8
+    tier: h_exact
+    hash: 0dc7d970a3a5f0c07a97a9d6b3adcb5c89a4256a
+    source: src/shared/engine_core.h
+    func: DEFINE_func_8017CCF8
+    vram: 0x8017CCF8
+    binaries: [ov_SC02_031, ov_SC03_031]
diff --git a/src/ov_SC02_031/ov_SC02_031_jr_8017AE2C.c b/src/ov_SC02_031/ov_SC02_031_jr_8017AE2C.c
index 9e65fb44a..845c31bbb 100644
--- a/src/ov_SC02_031/ov_SC02_031_jr_8017AE2C.c
+++ b/src/ov_SC02_031/ov_SC02_031_jr_8017AE2C.c
@@ -4013,28 +4013,7 @@ void func_8017CC04(void *a0) {
 
 
 
-extern s16 func_80128CFC(u16 a0);
-
-void func_8017CCF8(void *a0) {
-    void *v1 = *(void **)(a0 + 0xDC);
-    s16 v0;
-
-    if (*(u8 *)(v1 + 1) == 0) {
-        v0 = 1;
-    } else {
-        v0 = *(s16 *)(a0 + 0x108);
-        if (v0 == 0) {
-            u16 arg = *(u16 *)(v1 + 2);
-            v0 = func_80128CFC(arg);
-            *(s16 *)(a0 + 0x108) = v0;
-        }
-        v0 = *(s16 *)(a0 + 0x108);
-    }
-
-    if (v0 != 0) {
-        *(u16 *)(a0 + 0x2) += 1;
-    }
-}
+DEFINE_func_8017CCF8()  /* dedup: shared engine-core @0x8017CCF8 (src/shared) */
 
 
 
diff --git a/src/ov_SC03_031/ov_SC03_031_jr_8017AE2C.c b/src/ov_SC03_031/ov_SC03_031_jr_8017AE2C.c
index cab324004..cd2bf09a6 100644
--- a/src/ov_SC03_031/ov_SC03_031_jr_8017AE2C.c
+++ b/src/ov_SC03_031/ov_SC03_031_jr_8017AE2C.c
@@ -4019,28 +4019,7 @@ void func_8017CC04(void *a0) {
 
 
 
-extern s16 func_80128CFC(u16 a0);
-
-void func_8017CCF8(void *a0) {
-    void *v1 = *(void **)(a0 + 0xDC);
-    s16 v0;
-
-    if (*(u8 *)(v1 + 1) == 0) {
-        v0 = 1;
-    } else {
-        v0 = *(s16 *)(a0 + 0x108);
-        if (v0 == 0) {
-            u16 arg = *(u16 *)(v1 + 2);
-            v0 = func_80128CFC(arg);
-            *(s16 *)(a0 + 0x108) = v0;
-        }
-        v0 = *(s16 *)(a0 + 0x108);
-    }
-
-    if (v0 != 0) {
-        *(u16 *)(a0 + 0x2) += 1;
-    }
-}
+DEFINE_func_8017CCF8()  /* dedup: shared engine-core @0x8017CCF8 (src/shared) */
 
 
 
diff --git a/src/shared/engine_core.h b/src/shared/engine_core.h
index 7ac0542de..aa771274e 100644
--- a/src/shared/engine_core.h
+++ b/src/shared/engine_core.h
@@ -60150,6 +60150,27 @@
         ((void (*)(Ent_8017BFE0_8017DCD8 *))func_8017DF10)(param_1); \
     }
 
+#define DEFINE_func_8017CCF8() \
+    extern s16 func_80128CFC(u16 a0); \
+    void func_8017CCF8(void *a0) { \
+        void *v1 = *(void **)(a0 + 0xDC); \
+        s16 v0; \
+        if (*(u8 *)(v1 + 1) == 0) { \
+            v0 = 1; \
+        } else { \
+            v0 = *(s16 *)(a0 + 0x108); \
+            if (v0 == 0) { \
+                u16 arg = *(u16 *)(v1 + 2); \
+                v0 = func_80128CFC(arg); \
+                *(s16 *)(a0 + 0x108) = v0; \
+            } \
+            v0 = *(s16 *)(a0 + 0x108); \
+        } \
+        if (v0 != 0) { \
+            *(u16 *)(a0 + 0x2) += 1; \
+        } \
+    }
+
 #endif
 
 #define DEFINE_func_80128EA8() \
@@ -149705,4 +149726,25 @@
         ((void (*)(Ent_8017BFE0_8017DCD8 *))func_8017DF10)(param_1); \
     }
 
+#define DEFINE_func_8017CCF8() \
+    extern s16 func_80128CFC(u16 a0); \
+    void func_8017CCF8(void *a0) { \
+        void *v1 = *(void **)(a0 + 0xDC); \
+        s16 v0; \
+        if (*(u8 *)(v1 + 1) == 0) { \
+            v0 = 1; \
+        } else { \
+            v0 = *(s16 *)(a0 + 0x108); \
+            if (v0 == 0) { \
+                u16 arg = *(u16 *)(v1 + 2); \
+                v0 = func_80128CFC(arg); \
+                *(s16 *)(a0 + 0x108) = v0; \
+            } \
+            v0 = *(s16 *)(a0 + 0x108); \
+        } \
+        if (v0 != 0) { \
+            *(u16 *)(a0 + 0x2) += 1; \
+        } \
+    }
+
 #endif