diff --git a/gfx/thebes/gfxFontEntry.cpp b/gfx/thebes/gfxFontEntry.cpp
index 765332aef5..ac841a550c 100644
--- a/gfx/thebes/gfxFontEntry.cpp
+++ b/gfx/thebes/gfxFontEntry.cpp
@@ -520,8 +520,9 @@ ShareTableAndGetBlob(nsTArray<uint8_t>&& aTable,
                            mSharedBlobData, DeleteFontTableBlobData);
     if (mBlob == hb_blob_get_empty() ) {
         // The FontTableBlobData was destroyed during hb_blob_create().
-        // The (empty) blob is still be held in the hashtable with a strong
+        // The (empty) blob will still be held in the hashtable with a strong
         // reference.
+        mSharedBlobData = nullptr;
         return hb_blob_reference(mBlob);
     }