diff --git a/engine/src/flutter/lib/ui/painting.dart b/engine/src/flutter/lib/ui/painting.dart
index 0b7c330f114..ea1233e441a 100644
--- a/engine/src/flutter/lib/ui/painting.dart
+++ b/engine/src/flutter/lib/ui/painting.dart
@@ -3531,9 +3531,9 @@ class _ImageFilter extends NativeFieldWrapperClass1 {
       creator = filter {    // ignore: prefer_initializing_formals
     _constructor();
     final _ColorFilter? nativeFilter = filter._toNativeColorFilter();
-    _initColorFilter(nativeFilter);
+    _initColorFilter(nativeFilter!);
   }
-  void _initColorFilter(_ColorFilter? colorFilter) native 'ImageFilter_initColorFilter';
+  void _initColorFilter(_ColorFilter colorFilter) native 'ImageFilter_initColorFilter';
 
   /// Composes `_innerFilter` with `_outerFilter`.
   _ImageFilter.composed(_ComposeImageFilter filter)
diff --git a/engine/src/flutter/lib/ui/painting/image_filter.cc b/engine/src/flutter/lib/ui/painting/image_filter.cc
index 0fb65b8bc8b..dd4c5c35dee 100644
--- a/engine/src/flutter/lib/ui/painting/image_filter.cc
+++ b/engine/src/flutter/lib/ui/painting/image_filter.cc
@@ -92,14 +92,15 @@ void ImageFilter::initMatrix(const tonic::Float64List& matrix4,
 }
 
 void ImageFilter::initColorFilter(ColorFilter* colorFilter) {
-  filter_ = std::make_shared<DlColorFilterImageFilter>(
-      colorFilter ? colorFilter->dl_filter() : nullptr);
+  FML_DCHECK(colorFilter);
+  filter_ =
+      std::make_shared<DlColorFilterImageFilter>(colorFilter->dl_filter());
 }
 
 void ImageFilter::initComposeFilter(ImageFilter* outer, ImageFilter* inner) {
-  filter_ = std::make_shared<DlComposeImageFilter>(
-      outer ? outer->dl_filter() : nullptr,
-      inner ? inner->dl_filter() : nullptr);
+  FML_DCHECK(outer && inner);
+  filter_ = std::make_shared<DlComposeImageFilter>(outer->dl_filter(),
+                                                   inner->dl_filter());
 }
 
 }  // namespace flutter