diff --git a/mozilla/modules/libpref/src/win/winpref.js b/mozilla/modules/libpref/src/win/winpref.js
index 4cbfe5dc2ab..20fa23f0290 100644
--- a/mozilla/modules/libpref/src/win/winpref.js
+++ b/mozilla/modules/libpref/src/win/winpref.js
@@ -53,7 +53,7 @@ pref("font.name.monospace.he", "Courier New");
 pref("font.name.cursive.he", "Comic Sans MS");
 
 pref("font.name.serif.ja", "ＭＳ Ｐ明朝"); // "MS PMincho"
-pref("font.name.sans-serif.ja", "MS UI Gothic");
+pref("font.name.sans-serif.ja", "ＭＳ Ｐゴシック"); // "MS PGothic"
 pref("font.name.monospace.ja", "ＭＳ ゴシック"); // "MS Gothic"
 pref("font.name-list.serif.ja", "MS PMincho, MS PGothic, MS Mincho, MS Gothic");
 pref("font.name-list.sans-serif.ja", "MS PGothic, MS PMincho, MS Gothic, MS Mincho");