--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -6199,17 +6199,16 @@ nsTextFrame::DrawEmphasisMarks(gfxContex
                                const gfxPoint& aTextBaselinePt,
                                uint32_t aOffset, uint32_t aLength,
                                const nscolor* aDecorationOverrideColor,
                                PropertyProvider& aProvider)
 {
   auto info = static_cast<const EmphasisMarkInfo*>(
     Properties().Get(EmphasisMarkProperty()));
   if (!info) {
-    MOZ_ASSERT(!StyleText()->HasTextEmphasis());
     return;
   }
 
   nscolor color = aDecorationOverrideColor ? *aDecorationOverrideColor :
     nsLayoutUtils::GetColor(this, eCSSProperty_text_emphasis_color);
   aContext->SetColor(Color::FromABGR(color));
   gfxPoint pt(aTextBaselinePt);
   if (!aWM.IsVertical()) {