diff --git a/audio/musescore/Makefile b/audio/musescore/Makefile
index dc119dfa74fb..39b2a3887458 100644
--- a/audio/musescore/Makefile
+++ b/audio/musescore/Makefile
@@ -1,67 +1,70 @@
 PORTNAME=	${GH_PROJECT:tl}
 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/ \
 		https://github.com/musescore/MuseScore
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 LIB_DEPENDS=	libsndfile.so:audio/libsndfile \
 		libasound.so:audio/alsa-lib \
 		libasound_module_pcm_oss.so:audio/alsa-plugins \
 		libFLAC.so:audio/flac \
 		libfreetype.so:print/freetype2 \
 		libharfbuzz.so:print/harfbuzz \
 		libopus.so:audio/opus \
 		libopusenc.so:audio/libopusenc \
 		libtinyxml2.so:textproc/tinyxml2 \
 		libxkbcommon.so:x11/libxkbcommon
 
 USES=		cmake compiler:c++17-lang desktop-file-utils gl localbase \
 		pkgconfig qt:6 shared-mime-info
 USE_QT=		base 5compat declarative networkauth scxml svg \
 		tools:build
 USE_GL=		gl
 
 USE_GITHUB=	yes
 GH_PROJECT=	MuseScore
 GH_TAGNAME=	v4.5
 
 # Each release gets a subdir containing the distfiles for that release,
 # so hope that scanning the parent dir finds new ones.
 #
 # Note needs PORTVERSION:R once there is a .minor version
 DATADIR=	${PREFIX}/share/mscore-${PORTVERSION:R}
 
 CMAKE_TESTS=	MUE_BUILD_BRAILLE_TESTS MUE_BUILD_ENGRAVING_TESTS MUE_BUILD_IMPORTEXPORT_TESTS MUE_BUILD_NOTATION_TESTS MUE_BUILD_PLAYBACK_TESTS MUE_BUILD_PROJECT_TESTS
 CMAKE_ON=	MUE_COMPILE_USE_SYSTEM_FLAC \
 		MUE_COMPILE_USE_SYSTEM_FREETYPE \
 		MUE_COMPILE_USE_SYSTEM_HARFBUZZ \
 		MUE_COMPILE_USE_SYSTEM_OPUS \
 		MUE_COMPILE_USE_SYSTEM_OPUSENC \
 		MUE_COMPILE_USE_SYSTEM_TINYXML
 CMAKE_OFF=	MUE_BUILD_CRASHPAD_CLIENT \
 		MUE_COMPILE_USE_PCH \
 		${CMAKE_TESTS}
 CMAKE_BUILD_TYPE=	release
 CMAKE_ARGS=	-DMUSE_APP_BUILD_MODE="release"
 
 post-install:
 	# workaround for https://github.com/musescore/MuseScore/issues/26103
 	@${RM} -r \
 		${STAGEDIR}${PREFIX}/include \
 		${STAGEDIR}${PREFIX}/lib \
 		${STAGEDIR}${PREFIX}/libdata
 	# workaround for https://github.com/musescore/MuseScore/issues/26104
 	@${INSTALL_DATA} ${FILESDIR}/mscore.desktop ${STAGEDIR}${PREFIX}/share/applications/
 	@${REINPLACE_CMD} -e "\
 		s|^Version=.*|Version=${PORTVERSION}|; \
 		s|^Name=.*|Name=MuseScore|; \
 		"  ${STAGEDIR}${PREFIX}/share/applications/mscore.desktop
 
 .include <bsd.port.mk>
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')));
+     }
+ }
+