--- a/gfx/thebes/gfxFont.h
+++ b/gfx/thebes/gfxFont.h
@@ -4,16 +4,17 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #ifndef GFX_FONT_H
 #define GFX_FONT_H
 
 #include "gfxTypes.h"
 #include "gfxFontEntry.h"
+#include "gfxFontVariations.h"
 #include "nsString.h"
 #include "gfxPoint.h"
 #include "gfxPattern.h"
 #include "nsTArray.h"
 #include "nsTHashtable.h"
 #include "nsHashKeys.h"
 #include "gfxRect.h"
 #include "nsExpirationTracker.h"
@@ -99,16 +100,19 @@ struct gfxFontStyle {
     // font matching occurs.
 
     // -- list of value tags for specific alternate features
     nsTArray<gfxAlternateValue> alternateValues;
 
     // -- object used to look these up once the font is matched
     RefPtr<gfxFontFeatureValueSet> featureValueLookup;
 
+    // opentype variation settings
+    nsTArray<gfxFontVariation> variationSettings;
+
     // The logical size of the font, in pixels
     gfxFloat size;
 
     // The aspect-value (ie., the ratio actualsize:actualxheight) that any
     // actual physical font created from this font structure must have when
     // rendering or measuring a string. A value of -1.0 means no adjustment
     // needs to be done; otherwise the value must be nonnegative.
     float sizeAdjust;
@@ -204,16 +208,17 @@ struct gfxFontStyle {
             (explicitLanguage == other.explicitLanguage) &&
             (language == other.language) &&
             (baselineOffset == other.baselineOffset) &&
             (*reinterpret_cast<const uint32_t*>(&sizeAdjust) ==
              *reinterpret_cast<const uint32_t*>(&other.sizeAdjust)) &&
             (featureSettings == other.featureSettings) &&
             (alternateValues == other.alternateValues) &&
             (featureValueLookup == other.featureValueLookup) &&
+            (variationSettings == other.variationSettings) &&
             (languageOverride == other.languageOverride);
     }
 
     static void ParseFontFeatureSettings(const nsString& aFeatureString,
                                          nsTArray<gfxFontFeature>& aFeatures);
 
     static uint32_t ParseFontLanguageOverride(const nsString& aLangTag);
 };