diff --git a/src/modules/module-protocol-pulse/modules/module-ladspa-sink.c b/src/modules/module-protocol-pulse/modules/module-ladspa-sink.c
index 768e01466..6dafffc57 100644
--- a/src/modules/module-protocol-pulse/modules/module-ladspa-sink.c
+++ b/src/modules/module-protocol-pulse/modules/module-ladspa-sink.c
@@ -160,9 +160,9 @@ static void position_to_props(struct spa_audio_info_raw *info, struct pw_propert
 	uint32_t i;
 
 	pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info->channels);
-	p = s = alloca(info->channels * 6);
+	p = s = alloca(info->channels * 8);
 	for (i = 0; i < info->channels; i++)
-		p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+		p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 				channel_id2name(info->position[i]));
 	pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 }
diff --git a/src/modules/module-protocol-pulse/modules/module-ladspa-source.c b/src/modules/module-protocol-pulse/modules/module-ladspa-source.c
index 14611ab91..73060bb64 100644
--- a/src/modules/module-protocol-pulse/modules/module-ladspa-source.c
+++ b/src/modules/module-protocol-pulse/modules/module-ladspa-source.c
@@ -160,9 +160,9 @@ static void position_to_props(struct spa_audio_info_raw *info, struct pw_propert
 	uint32_t i;
 
 	pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info->channels);
-	p = s = alloca(info->channels * 6);
+	p = s = alloca(info->channels * 8);
 	for (i = 0; i < info->channels; i++)
-		p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+		p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 				channel_id2name(info->position[i]));
 	pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 }
diff --git a/src/modules/module-protocol-pulse/modules/module-null-sink.c b/src/modules/module-protocol-pulse/modules/module-null-sink.c
index 2ee4c1fe8..51c8ae5fe 100644
--- a/src/modules/module-protocol-pulse/modules/module-null-sink.c
+++ b/src/modules/module-protocol-pulse/modules/module-null-sink.c
@@ -177,9 +177,9 @@ struct module *create_module_null_sink(struct impl *impl, const char *argument)
 
 		pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info.channels);
 
-		p = s = alloca(info.channels * 6);
+		p = s = alloca(info.channels * 8);
 		for (i = 0; i < info.channels; i++)
-			p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+			p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 					channel_id2name(info.position[i]));
 		pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 	}
diff --git a/src/modules/module-protocol-pulse/modules/module-remap-sink.c b/src/modules/module-protocol-pulse/modules/module-remap-sink.c
index 2b33756ef..74d72adb4 100644
--- a/src/modules/module-protocol-pulse/modules/module-remap-sink.c
+++ b/src/modules/module-protocol-pulse/modules/module-remap-sink.c
@@ -139,9 +139,9 @@ static void position_to_props(struct spa_audio_info_raw *info, struct pw_propert
 	uint32_t i;
 
 	pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info->channels);
-	p = s = alloca(info->channels * 6);
+	p = s = alloca(info->channels * 8);
 	for (i = 0; i < info->channels; i++)
-		p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+		p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 				channel_id2name(info->position[i]));
 	pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 }
diff --git a/src/modules/module-protocol-pulse/modules/module-remap-source.c b/src/modules/module-protocol-pulse/modules/module-remap-source.c
index 821a0e708..4281c6331 100644
--- a/src/modules/module-protocol-pulse/modules/module-remap-source.c
+++ b/src/modules/module-protocol-pulse/modules/module-remap-source.c
@@ -139,9 +139,9 @@ static void position_to_props(struct spa_audio_info_raw *info, struct pw_propert
 	uint32_t i;
 
 	pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info->channels);
-	p = s = alloca(info->channels * 6);
+	p = s = alloca(info->channels * 8);
 	for (i = 0; i < info->channels; i++)
-		p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+		p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 				channel_id2name(info->position[i]));
 	pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 }
diff --git a/src/modules/module-protocol-pulse/modules/module-tunnel-sink.c b/src/modules/module-protocol-pulse/modules/module-tunnel-sink.c
index 050255c39..8f5dd9f91 100644
--- a/src/modules/module-protocol-pulse/modules/module-tunnel-sink.c
+++ b/src/modules/module-protocol-pulse/modules/module-tunnel-sink.c
@@ -144,9 +144,9 @@ static void audio_info_to_props(struct spa_audio_info_raw *info, struct pw_prope
 	uint32_t i;
 
 	pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info->channels);
-	p = s = alloca(info->channels * 6);
+	p = s = alloca(info->channels * 8);
 	for (i = 0; i < info->channels; i++)
-		p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+		p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 				channel_id2name(info->position[i]));
 	pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 }
diff --git a/src/modules/module-protocol-pulse/modules/module-tunnel-source.c b/src/modules/module-protocol-pulse/modules/module-tunnel-source.c
index f4944593b..26226d01f 100644
--- a/src/modules/module-protocol-pulse/modules/module-tunnel-source.c
+++ b/src/modules/module-protocol-pulse/modules/module-tunnel-source.c
@@ -144,9 +144,9 @@ static void audio_info_to_props(struct spa_audio_info_raw *info, struct pw_prope
 	uint32_t i;
 
 	pw_properties_setf(props, SPA_KEY_AUDIO_CHANNELS, "%u", info->channels);
-	p = s = alloca(info->channels * 6);
+	p = s = alloca(info->channels * 8);
 	for (i = 0; i < info->channels; i++)
-		p += snprintf(p, 6, "%s%s", i == 0 ? "" : ",",
+		p += snprintf(p, 8, "%s%s", i == 0 ? "" : ",",
 				channel_id2name(info->position[i]));
 	pw_properties_set(props, SPA_KEY_AUDIO_POSITION, s);
 }