diff --git a/adapters/displayio/displayio.go b/adapters/displayio/displayio.go
index 5e63fe2b5a..b665cecd3e 100644
--- a/adapters/displayio/displayio.go
+++ b/adapters/displayio/displayio.go
@@ -35,6 +35,14 @@ func (adapter *adapter) MakeRequests(request *openrtb2.BidRequest, requestInfo *
 	result := make([]*adapters.RequestData, 0, len(request.Imp))
 	errs := make([]error, 0, len(request.Imp))
 
+	// Display.io keys Apple traffic on "iOS" and does not recognise "iPadOS".
+	device := request.Device
+	if device != nil && device.OS == "iPadOS" {
+		deviceCopy := *device
+		deviceCopy.OS = "iOS"
+		device = &deviceCopy
+	}
+
 	for _, impression := range request.Imp {
 		var requestExt map[string]interface{}
 
@@ -75,6 +83,7 @@ func (adapter *adapter) MakeRequests(request *openrtb2.BidRequest, requestInfo *
 		dioExt := reqDioExt{PlacementId: impressionExt.PlacementId, InventoryId: impressionExt.InventoryId}
 
 		requestCopy := *request
+		requestCopy.Device = device
 
 		err = jsonutil.Unmarshal(requestCopy.Ext, &requestExt)
 		if err != nil {
diff --git a/adapters/displayio/displayiotest/supplemental/ipados-os.json b/adapters/displayio/displayiotest/supplemental/ipados-os.json
new file mode 100644
index 0000000000..ccdf0af28a
--- /dev/null
+++ b/adapters/displayio/displayiotest/supplemental/ipados-os.json
@@ -0,0 +1,83 @@
+{
+  "mockBidRequest": {
+    "app": {
+      "id": "1011"
+    },
+    "device": {
+      "os": "iPadOS",
+      "osv": "18.5",
+      "make": "Apple",
+      "model": "iPad"
+    },
+    "id": "requestId10111011101110111011",
+    "imp": [
+      {
+        "banner": {
+          "h": 250,
+          "w": 300
+        },
+        "bidfloor": 0.225,
+        "bidfloorcur": "USD",
+        "id": "impId10111011101110111011",
+        "ext": {
+          "bidder": {
+            "placementId": "1011",
+            "publisherId": "101",
+            "inventoryId": "1011"
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "https://adapter.endpoint/?macro=101",
+        "body": {
+          "id": "requestId10111011101110111011",
+          "app": {
+            "id": "1011"
+          },
+          "device": {
+            "os": "iOS",
+            "osv": "18.5",
+            "make": "Apple",
+            "model": "iPad"
+          },
+          "imp": [
+            {
+              "banner": {
+                "h": 250,
+                "w": 300
+              },
+              "bidfloor": 0.225,
+              "bidfloorcur": "USD",
+              "id": "impId10111011101110111011",
+              "ext": {
+                "bidder": {
+                  "placementId": "1011",
+                  "publisherId": "101",
+                  "inventoryId": "1011"
+                }
+              }
+            }
+          ],
+          "ext": {
+            "displayio": {
+              "placementId": "1011",
+              "inventoryId": "1011"
+            }
+          }
+        },
+        "impIDs": [
+          "impId10111011101110111011"
+        ]
+      },
+      "mockResponse": {
+        "status": 204,
+        "body": {}
+      }
+    }
+  ],
+  "expectedBidResponses": []
+}