diff --git a/layout/style/GeckoBindings.cpp b/layout/style/GeckoBindings.cpp
index ee784cef626a12da58ac1f6c6c8538c454f82f4f..32158faf39de766a16318018f325d0e6c6aef50c 100644
--- a/layout/style/GeckoBindings.cpp
+++ b/layout/style/GeckoBindings.cpp
@@ -1032,7 +1032,7 @@ 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,