diff -pruN 6.9.2+dfsg-1/debian/changelog 6.9.2+dfsg-1ubuntu1/debian/changelog
--- 6.9.2+dfsg-1/debian/changelog	2025-09-03 21:08:25.000000000 +0000
+++ 6.9.2+dfsg-1ubuntu1/debian/changelog	2025-09-04 17:54:30.000000000 +0000
@@ -1,3 +1,9 @@
+qt6-base (6.9.2+dfsg-1ubuntu1) questing; urgency=medium
+
+  * Update symbols for IEEE long-double on ppc64el.
+
+ -- Rik Mills <rikmills@kde.org>  Thu, 04 Sep 2025 18:54:30 +0100
+
 qt6-base (6.9.2+dfsg-1) experimental; urgency=medium
 
   [ Patrick Franz ]
diff -pruN 6.9.2+dfsg-1/debian/libqt6core6t64.symbols 6.9.2+dfsg-1ubuntu1/debian/libqt6core6t64.symbols
--- 6.9.2+dfsg-1/debian/libqt6core6t64.symbols	2025-09-03 20:26:12.000000000 +0000
+++ 6.9.2+dfsg-1ubuntu1/debian/libqt6core6t64.symbols	2025-09-04 17:54:08.000000000 +0000
@@ -159,7 +159,8 @@ libQt6Core.so.6 libqt6core6t64 #MINVER#
  (subst)_Z5qHashRK9QUrlQuery{size_t}@Qt_6 6.1.2
  (subst)_Z5qHashRKN10QByteArray16FromBase64ResultE{size_t}@Qt_6 6.1.2
  (subst)_Z5qHashd{size_t}@Qt_6 6.1.2
- (subst)_Z5qHash{long_double}{size_t}@Qt_6 6.1.2
+ (arch=ppc64el)_Z5qHashu9__ieee128m@Qt_6 6.9.2
+ (subst|arch=!ppc64el)_Z5qHash{long_double}{size_t}@Qt_6 6.9.2
  _Z5qQNaNv@Qt_6 6.1.2
  _Z5qSNaNv@Qt_6 6.1.2
  _Z5qdtoadPiS_@Qt_6 6.1.2