diff --git a/multimedia/qt6-multimedia/files/patch-src_multimedia_pulseaudio_qpulseaudiosink.cpp b/multimedia/qt6-multimedia/files/patch-src_multimedia_pulseaudio_qpulseaudiosink.cpp
new file mode 100644
index 000000000000..42f24b8af9cb
--- /dev/null
+++ b/multimedia/qt6-multimedia/files/patch-src_multimedia_pulseaudio_qpulseaudiosink.cpp
@@ -0,0 +1,15 @@
+Fix 32-bit builds with PULSEAUDIO option.
+
+--- src/multimedia/pulseaudio/qpulseaudiosink.cpp.orig	2025-02-20 14:13:07 UTC
++++ src/multimedia/pulseaudio/qpulseaudiosink.cpp
+@@ -496,8 +496,8 @@ qint64 QPulseAudioSink::write(const char *data, qint64
+     // or even affect the system volume if flat volumes are enabled
+ 
+     QAudioHelperInternal::applyVolume(m_volume, m_format,
+-                                      QSpan{ reinterpret_cast<const std::byte *>(data), len },
+-                                      QSpan{ reinterpret_cast<std::byte *>(dest), len });
++                                      QSpan{ reinterpret_cast<const std::byte *>(data), static_cast<qsizetype>(len) },
++                                      QSpan{ reinterpret_cast<std::byte *>(dest), static_cast<qsizetype>(len) });
+ 
+     if ((pa_stream_write(m_stream.get(), dest, len, nullptr, 0, PA_SEEK_RELATIVE)) < 0) {
+         engineLock.unlock();