diff --git a/packages/core/ui/styling/background.ios.ts b/packages/core/ui/styling/background.ios.ts
index e3eb08627..6e8f8f320 100644
--- a/packages/core/ui/styling/background.ios.ts
+++ b/packages/core/ui/styling/background.ios.ts
@@ -736,7 +736,12 @@ function drawBoxShadow(nativeView: NativeScriptUIView, view: View, boxShadow: CS
 	);
 
 	// this should match the view's border radius
-	const cornerRadius = Length.toDevicePixels(<CoreTypes.LengthType>view.style.borderRadius, 0.0);
+	let cornerRadius: number;
+	if (typeof view.style.borderRadius !== 'number') {
+		cornerRadius = Length.toDevicePixels(<CoreTypes.LengthType>view.style.borderRadius, 0.0);
+	} else {
+		cornerRadius = view.style.borderRadius;
+	}
 
 	// apply spreadRadius by expanding shadow layer bounds
 	// prettier-ignore