diff --git a/include/constants/daycare.h b/include/constants/daycare.h
index ac48e4f716..782bbe9546 100644
--- a/include/constants/daycare.h
+++ b/include/constants/daycare.h
@@ -13,7 +13,6 @@
 #define DAYCARE_ONE_MON     2
 #define DAYCARE_TWO_MONS    3
 
-#define INHERITED_IV_COUNT 3
 #if P_EGG_HATCH_LEVEL >= GEN_4
 #define EGG_HATCH_LEVEL 1
 #else
diff --git a/src/daycare.c b/src/daycare.c
index 2a96ca7a91..cabecc8ea5 100644
--- a/src/daycare.c
+++ b/src/daycare.c
@@ -539,11 +539,17 @@ static void RemoveIVIndexFromList(u8 *ivs, u8 selectedIv)
 
 static void InheritIVs(struct Pokemon *egg, struct DayCare *daycare)
 {
+    u16 motherItem = GetBoxMonData(&daycare->mons[0].mon, MON_DATA_HELD_ITEM);
+    u16 fatherItem = GetBoxMonData(&daycare->mons[1].mon, MON_DATA_HELD_ITEM);
     u8 i;
-    u8 selectedIvs[INHERITED_IV_COUNT];
+    u8 selectedIvs[5];
     u8 availableIVs[NUM_STATS];
-    u8 whichParents[INHERITED_IV_COUNT];
+    u8 whichParents[5];
     u8 iv;
+    u8 howManyIVs = 3;
+
+    if (motherItem == ITEM_DESTINY_KNOT || fatherItem == ITEM_DESTINY_KNOT)
+        howManyIVs = 5;
 
     // Initialize a list of IV indices.
     for (i = 0; i < NUM_STATS; i++)
@@ -551,8 +557,8 @@ static void InheritIVs(struct Pokemon *egg, struct DayCare *daycare)
         availableIVs[i] = i;
     }
 
-    // Select the 3 IVs that will be inherited.
-    for (i = 0; i < INHERITED_IV_COUNT; i++)
+    // Select which IVs that will be inherited.
+    for (i = 0; i < howManyIVs; i++)
     {
         // Randomly pick an IV from the available list and stop from being chosen again.
         // BUG: Instead of removing the IV that was just picked, this
@@ -571,13 +577,13 @@ static void InheritIVs(struct Pokemon *egg, struct DayCare *daycare)
     }
 
     // Determine which parent each of the selected IVs should inherit from.
-    for (i = 0; i < INHERITED_IV_COUNT; i++)
+    for (i = 0; i < howManyIVs; i++)
     {
         whichParents[i] = Random() % DAYCARE_MON_COUNT;
     }
 
     // Set each of inherited IVs on the egg mon.
-    for (i = 0; i < INHERITED_IV_COUNT; i++)
+    for (i = 0; i < howManyIVs; i++)
     {
         switch (selectedIvs[i])
         {