--- a/dom/html/HTMLImageElement.cpp
+++ b/dom/html/HTMLImageElement.cpp
@@ -765,17 +765,16 @@ HTMLImageElement::NaturalHeight()
     MOZ_ASSERT(false, "GetNaturalHeight should not fail");
     return 0;
   }
 
   if (mResponsiveSelector) {
     double density = mResponsiveSelector->GetSelectedImageDensity();
     MOZ_ASSERT(density >= 0.0);
     height = NSToIntRound(double(height) / density);
-    height = std::max(height, 0u);
   }
 
   return height;
 }
 
 NS_IMETHODIMP
 HTMLImageElement::GetNaturalHeight(uint32_t* aNaturalHeight)
 {
@@ -793,17 +792,16 @@ HTMLImageElement::NaturalWidth()
     MOZ_ASSERT(false, "GetNaturalWidth should not fail");
     return 0;
   }
 
   if (mResponsiveSelector) {
     double density = mResponsiveSelector->GetSelectedImageDensity();
     MOZ_ASSERT(density >= 0.0);
     width = NSToIntRound(double(width) / density);
-    width = std::max(width, 0u);
   }
 
   return width;
 }
 
 NS_IMETHODIMP
 HTMLImageElement::GetNaturalWidth(uint32_t* aNaturalWidth)
 {