--- a/gfx/thebes/gfxUserFontSet.cpp
+++ b/gfx/thebes/gfxUserFontSet.cpp
@@ -397,19 +397,21 @@ StoreUserFontData(gfxFontEntry* aFontEnt
     userFontData->mFormat = src.mFormatFlags;
     userFontData->mRealName = aOriginalName;
     if (aMetadata) {
         userFontData->mMetadata.SwapElements(*aMetadata);
         userFontData->mMetaOrigLen = aMetaOrigLen;
     }
 }
 
-static void
-CopyWOFFMetadata(const PRUint8* aFontData, PRUint32 aLength,
-                 nsTArray<PRUint8>* aMetadata, PRUint32* aMetaOrigLen)
+void
+gfxUserFontSet::CopyWOFFMetadata(const PRUint8* aFontData,
+                                 PRUint32 aLength,
+                                 nsTArray<PRUint8>* aMetadata,
+                                 PRUint32* aMetaOrigLen)
 {
     // This function may be called with arbitrary, unvalidated "font" data
     // from @font-face, so it needs to be careful to bounds-check, etc.,
     // before trying to read anything.
     // This just saves a copy of the compressed data block; it does NOT check
     // that the block can be successfully decompressed, or that it contains
     // well-formed/valid XML metadata.
     struct WOFFHeader {

--- a/gfx/thebes/gfxUserFontSet.h
+++ b/gfx/thebes/gfxUserFontSet.h
@@ -276,16 +276,22 @@ protected:
                                 nsresult aStatus = 0) = 0;
 
     // font families defined by @font-face rules
     nsRefPtrHashtable<nsStringHashKey, gfxMixedFontFamily> mFontFamilies;
 
     PRUint64        mGeneration;
 
     static PRLogModuleInfo *sUserFontsLog;
+
+private:
+    static void CopyWOFFMetadata(const PRUint8* aFontData,
+                                 PRUint32 aLength,
+                                 nsTArray<PRUint8>* aMetadata,
+                                 PRUint32* aMetaOrigLen);
 };
 
 // acts a placeholder until the real font is downloaded
 
 class gfxProxyFontEntry : public gfxFontEntry {
     friend class gfxUserFontSet;
 
 public: