diff --git a/sigil-gt6.8-qchar-778.patch b/sigil-gt6.8-qchar-778.patch
new file mode 100644
index 0000000..b5f432f
--- /dev/null
+++ b/sigil-gt6.8-qchar-778.patch
@@ -0,0 +1,61 @@
+From 08ed327cf220eca9c814ea2a65adace24a4cf3d9 Mon Sep 17 00:00:00 2001
+From: Echo J <tcg96nougat@gmail.com>
+Date: Sat, 19 Oct 2024 19:43:17 +0300
+Subject: [PATCH] Parsers: Make QChar conversions explicit
+
+This is required without the QT_IMPLICIT_QCHAR_CONSTRUCTION macro
+---
+ src/Parsers/qCSSParser.cpp | 2 +-
+ src/Parsers/qCSSUtils.cpp  | 4 ++--
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+Index: Sigil-2.3.1/src/Parsers/qCSSParser.cpp
+===================================================================
+--- Sigil-2.3.1.orig/src/Parsers/qCSSParser.cpp
++++ Sigil-2.3.1/src/Parsers/qCSSParser.cpp
+@@ -250,7 +250,7 @@ QString CSSParser::unicode(QString& istr
+         (CSSUtils::hexdec(add) > 96 && CSSUtils::hexdec(add) < 123))
+     {
+         QString msg = "Replaced unicode notation: Changed \\" + CSSUtils::rtrim(add) + " to ";
+-        add = static_cast<int>(CSSUtils::hexdec(add));
++        add = QChar(static_cast<int>(CSSUtils::hexdec(add)));
+         msg += add;
+         log(msg,Information);
+         replaced = true;
+Index: Sigil-2.3.1/src/Parsers/qCSSUtils.cpp
+===================================================================
+--- Sigil-2.3.1.orig/src/Parsers/qCSSUtils.cpp
++++ Sigil-2.3.1/src/Parsers/qCSSUtils.cpp
+@@ -98,7 +98,7 @@ QChar CSSUtils::s_at(const QString &istr
+ {
+     if(pos > (istring.length()-1) || pos < 0)
+     {
+-        return 0;
++        return QChar(0);
+     } 
+     else 
+     {
+@@ -168,7 +168,7 @@ QString CSSUtils::build_value(const QVec
+ 
+ bool CSSUtils::ctype_space(const QChar c)
+ {
+-    return (c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == 11);
++    return (c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == QChar(11));
+ }
+ 
+ 
+Index: Sigil-2.3.1/src/qt6sigil.cmake
+===================================================================
+--- Sigil-2.3.1.orig/src/qt6sigil.cmake
++++ Sigil-2.3.1/src/qt6sigil.cmake
+@@ -2,10 +2,6 @@
+ #     Build Sigil against Qt6 - requires cmake 3.16+ and a C++17 compiler
+ #############################################################################
+ 
+-# quiet Qt 6 deprecat4ed warnings
+-# add_definitions(-DQT_NO_DEPRECATED_WARNINGS)
+-add_definitions(-DQT_IMPLICIT_QCHAR_CONSTRUCTION)
+-
+ if (CMAKE_VERSION VERSION_GREATER "3.27.9")
+     cmake_policy(SET CMP0153 OLD)
+ endif()
diff --git a/sigil.changes b/sigil.changes
index 915801e..4f240dc 100644
--- a/sigil.changes
+++ b/sigil.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Nov 17 14:24:42 UTC 2024 - ecsos <ecsos@opensuse.org>
+
+- Add sigil-gt6.8-qchar-778.patch to fix build error under
+  Tumbleweed with Qt 6.8.
+
 -------------------------------------------------------------------
 Sat Sep  7 14:43:25 UTC 2024 - ecsos <ecsos@opensuse.org>
 
diff --git a/sigil.spec b/sigil.spec
index 8a67950..ef8af5d 100644
--- a/sigil.spec
+++ b/sigil.spec
@@ -30,11 +30,13 @@ Source1:        https://github.com/Sigil-Ebook/sigil-user-guide/releases/downloa
 Source2:        %{name}.desktop
 # PATCH-FIX-OPENSUSE Disabled __DATE__ and __TIME__ which is replaced later in pre section
 Patch0:         %{name}-gt-0.9.0-Dialogs-About.cpp.patch
+# PATCH-FIX-UPSTREAM  Remove implicit QChar conversions #778
+Patch1:         sigil-gt6.8-qchar-778.patch
 BuildRequires:  boost-devel
 BuildRequires:  cmake >= 3.0
 BuildRequires:  dos2unix
 BuildRequires:  fdupes
-%if 0%{?suse_version} <= 1600
+%if 0%{?suse_version} < 1600
 BuildRequires:  gcc12
 BuildRequires:  gcc12-c++
 %else