--- a/dom/canvas/moz.build
+++ b/dom/canvas/moz.build
@@ -61,16 +61,17 @@ EXPORTS.mozilla.dom += [
     'CanvasPattern.h',
     'CanvasRenderingContext2D.h',
     'CanvasRenderingContextHelper.h',
     'CanvasUtils.h',
     'ImageBitmap.h',
     'ImageBitmapRenderingContext.h',
     'ImageBitmapSource.h',
     'ImageData.h',
+    'ImageUtils.h',
     'OffscreenCanvas.h',
     'TextMetrics.h',
     'WebGLVertexArrayObject.h',
 ]
 
 # Canvas 2D and common sources
 UNIFIED_SOURCES += [
     'CanvasImageCache.cpp',