diff --git a/audio/musescore/Makefile b/audio/musescore/Makefile
index dc119dfa74fb..39b2a3887458 100644
--- a/audio/musescore/Makefile
+++ b/audio/musescore/Makefile
@@ -3,6 +3,9 @@ DISTVERSIONPREFIX=	v
 DISTVERSION=	4.5.1
 CATEGORIES=	audio
 
+PATCH_SITES=	https://github.com/musescore/MuseScore/commit/
+PATCHFILES+=	05056ed19520060c3912a09a3adfa0927057f956.patch:-p1 # Fix build with Qt >= 6.9.0
+
 MAINTAINER=	adridg@FreeBSD.org
 COMMENT=	Free music composition & notation software
 WWW=		https://musescore.org/ \
diff --git a/audio/musescore/distinfo b/audio/musescore/distinfo
index 8c86984c3555..772f4fb39788 100644
--- a/audio/musescore/distinfo
+++ b/audio/musescore/distinfo
@@ -1,3 +1,5 @@
 TIMESTAMP = 1743123988
 SHA256 (musescore-MuseScore-v4.5.1-v4.5_GH0.tar.gz) = 13807e7970bb7506d1e06ce32798b020609409c96f4f0b9ff3b41ced596e74fd
 SIZE (musescore-MuseScore-v4.5.1-v4.5_GH0.tar.gz) = 144425720
+SHA256 (05056ed19520060c3912a09a3adfa0927057f956.patch) = 8f8b1d947562ccb78875c00f50ece2ba32cb2ff38ef9da6350fc1eae4eac734a
+SIZE (05056ed19520060c3912a09a3adfa0927057f956.patch) = 3471
diff --git a/audio/musescore/files/patch-src_palette_view_widgets_specialcharactersdialog.cpp b/audio/musescore/files/patch-src_palette_view_widgets_specialcharactersdialog.cpp
new file mode 100644
index 000000000000..5c7526072218
--- /dev/null
+++ b/audio/musescore/files/patch-src_palette_view_widgets_specialcharactersdialog.cpp
@@ -0,0 +1,18 @@
+Fix build with Qt >= 6.9.0
+
+/wrkdirs/usr/ports/audio/musescore/work/MuseScore-4.5/src/palette/view/widgets/specialcharactersdialog.cpp:715:55:
+error: no matching member function for call to 'arg'
+  715 |         m_pUnicode->appendElement(fs, QString("0x%1").arg(code, 5, 16, QChar('0')));
+      |                                       ~~~~~~~~~~~~~~~~^~~
+
+--- src/palette/view/widgets/specialcharactersdialog.cpp.orig	2025-03-13 18:44:57 UTC
++++ src/palette/view/widgets/specialcharactersdialog.cpp
+@@ -712,7 +712,7 @@ void SpecialCharactersDialog::populateUnicode()
+         std::shared_ptr<FSymbol> fs = std::make_shared<FSymbol>(gpaletteScore->dummy());
+         fs->setCode(code);
+         fs->setFont(m_font);
+-        m_pUnicode->appendElement(fs, QString("0x%1").arg(code, 5, 16, QLatin1Char('0')));
++        m_pUnicode->appendElement(fs, QString("0x%1").arg(static_cast<quint32>(code), 5, 16, QLatin1Char('0')));
+     }
+ }
+