diff --git a/media-sound/scream/files/scream-4.0-gcc15.patch b/media-sound/scream/files/scream-4.0-gcc15.patch
new file mode 100644
index 0000000000000..fc1b852be61de
--- /dev/null
+++ b/media-sound/scream/files/scream-4.0-gcc15.patch
@@ -0,0 +1,11 @@
+--- a/jack.c
++++ b/jack.c
+@@ -107,7 +107,7 @@ jo_data;
+ static int init_resampler();
+ static int init_channels();
+ static int connect_ports();
+-static int process_source_data();
++static int process_source_data(receiver_data_t *data);
+ 
+ // JACK realtime process callback
+ int jack_process(jack_nframes_t nframes, void *arg);
diff --git a/media-sound/scream/scream-4.0.ebuild b/media-sound/scream/scream-4.0.ebuild
index 8c7ed7611cf1c..960ab105d90ad 100644
--- a/media-sound/scream/scream-4.0.ebuild
+++ b/media-sound/scream/scream-4.0.ebuild
@@ -1,4 +1,4 @@
-# Copyright 2020-2022 Gentoo Authors
+# Copyright 2020-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -32,6 +32,10 @@ RDEPEND="
 DEPEND="${RDEPEND}"
 BDEPEND="virtual/pkgconfig"
 
+PATCHES=(
+	"${FILESDIR}/${P}-gcc15.patch"
+)
+
 src_configure() {
 	local mycmakeargs=(
 		-DALSA_ENABLE=$(usex alsa)