diff --git a/pipewire-alsa/alsa-plugins/pcm_pipewire.c b/pipewire-alsa/alsa-plugins/pcm_pipewire.c
index 24a66eabc..1ba0d93c1 100644
--- a/pipewire-alsa/alsa-plugins/pcm_pipewire.c
+++ b/pipewire-alsa/alsa-plugins/pcm_pipewire.c
@@ -1244,7 +1244,7 @@ static ssize_t log_write(void *cookie, const char *buf, size_t size)
 	return size;
 }
 
-static cookie_io_functions_t io_funcs = {
+static const cookie_io_functions_t io_funcs = {
 	.write = log_write,
 };
 
diff --git a/spa/plugins/alsa/alsa-pcm.c b/spa/plugins/alsa/alsa-pcm.c
index ca31366dc..eb6304d8b 100644
--- a/spa/plugins/alsa/alsa-pcm.c
+++ b/spa/plugins/alsa/alsa-pcm.c
@@ -726,7 +726,7 @@ static ssize_t log_write(void *cookie, const char *buf, size_t size)
 	return size;
 }
 
-static cookie_io_functions_t io_funcs = {
+static const cookie_io_functions_t io_funcs = {
 	.write = log_write,
 };