diff --git a/layout/style/GeckoBindings.cpp b/layout/style/GeckoBindings.cpp
index 56a16d313a5d30d12edf1f94459db1027af87002..3722f2d6ce6c0864956fed2b00c71a3286edc674 100644
--- a/layout/style/GeckoBindings.cpp
+++ b/layout/style/GeckoBindings.cpp
@@ -1068,7 +1068,7 @@ void Gecko_SetFontPaletteOverride(
     return;
   }
   aValues->mOverrides.AppendElement(gfx::FontPaletteValueSet::OverrideColor{
-      uint32_t(aIndex), gfx::sRGBColor::FromABGR(aColor->ToColor())});
+      uint32_t(aIndex), gfx::sRGBColor::FromABGR(aColor->ToColor(nullptr))});
 }
 
 void Gecko_EnsureImageLayersLength(nsStyleImageLayers* aLayers, size_t aLen,