diff --git a/src/modules/module-protocol-pulse/modules/module-always-sink.c b/src/modules/module-protocol-pulse/modules/module-always-sink.c
index e0ba258f6..f51c39df8 100644
--- a/src/modules/module-protocol-pulse/modules/module-always-sink.c
+++ b/src/modules/module-protocol-pulse/modules/module-always-sink.c
@@ -2,6 +2,7 @@
 /* SPDX-FileCopyrightText: Copyright © 2022 Wim Taymans <wim.taymans@gmail.com> */
 /* SPDX-License-Identifier: MIT */
 
+#include <spa/utils/json.h>
 #include <pipewire/pipewire.h>
 
 #include "../module.h"
@@ -50,14 +51,17 @@ static int module_always_sink_load(struct module *module)
 	FILE *f;
 	char *args;
 	const char *str;
+	char encoded[1024];
 	size_t size;
 
 	if ((f = open_memstream(&args, &size)) == NULL)
 		return -errno;
 
 	fprintf(f, "{");
-	if ((str = pw_properties_get(module->props, "sink_name")) != NULL)
-		fprintf(f, " sink.name = \"%s\"", str);
+	if ((str = pw_properties_get(module->props, "sink_name")) != NULL) {
+		spa_json_encode_string(encoded, sizeof(encoded), str);
+		fprintf(f, " sink.name = %s", encoded);
+	}
 	fprintf(f, " }");
 	fclose(f);
 
diff --git a/src/modules/module-protocol-pulse/modules/module-switch-on-connect.c b/src/modules/module-protocol-pulse/modules/module-switch-on-connect.c
index e4dc2deac..55c901d0b 100644
--- a/src/modules/module-protocol-pulse/modules/module-switch-on-connect.c
+++ b/src/modules/module-protocol-pulse/modules/module-switch-on-connect.c
@@ -135,11 +135,15 @@ static void manager_added(void *data, struct pw_manager_object *o)
 	/* Switch default */
 	pw_log_debug("switching to %s", name);
 
-	pw_manager_set_metadata(d->manager, d->metadata_default,
-			PW_ID_CORE,
-			pw_manager_object_is_sink(o) ? METADATA_CONFIG_DEFAULT_SINK
-				: METADATA_CONFIG_DEFAULT_SOURCE,
-			"Spa:String:JSON", "{ \"name\"\"%s\" }", name);
+	{
+		char encoded[1024];
+		spa_json_encode_string(encoded, sizeof(encoded), name);
+		pw_manager_set_metadata(d->manager, d->metadata_default,
+				PW_ID_CORE,
+				pw_manager_object_is_sink(o) ? METADATA_CONFIG_DEFAULT_SINK
+					: METADATA_CONFIG_DEFAULT_SOURCE,
+				"Spa:String:JSON", "{ \"name\" %s }", encoded);
+	}
 }
 
 static void manager_sync(void *data)
diff --git a/src/modules/module-protocol-pulse/modules/module-x11-bell.c b/src/modules/module-protocol-pulse/modules/module-x11-bell.c
index a29e2e85d..b9d7c4908 100644
--- a/src/modules/module-protocol-pulse/modules/module-x11-bell.c
+++ b/src/modules/module-protocol-pulse/modules/module-x11-bell.c
@@ -2,6 +2,7 @@
 /* SPDX-FileCopyrightText: Copyright © 2022 Wim Taymans <wim.taymans@gmail.com> */
 /* SPDX-License-Identifier: MIT */
 
+#include <spa/utils/json.h>
 #include <pipewire/pipewire.h>
 
 #include "../module.h"
@@ -58,20 +59,29 @@ static int module_x11_bell_load(struct module *module)
 	FILE *f;
 	char *args;
 	const char *str;
+	char encoded[1024];
 	size_t size;
 
 	if ((f = open_memstream(&args, &size)) == NULL)
 		return -errno;
 
 	fprintf(f, "{");
-	if ((str = pw_properties_get(module->props, "sink")) != NULL)
-		fprintf(f, " sink.name = \"%s\"", str);
-	if ((str = pw_properties_get(module->props, "sample")) != NULL)
-		fprintf(f, " sample.name = \"%s\"", str);
-	if ((str = pw_properties_get(module->props, "display")) != NULL)
-		fprintf(f, " x11.display = \"%s\"", str);
-	if ((str = pw_properties_get(module->props, "xauthority")) != NULL)
-		fprintf(f, " x11.xauthority = \"%s\"", str);
+	if ((str = pw_properties_get(module->props, "sink")) != NULL) {
+		spa_json_encode_string(encoded, sizeof(encoded), str);
+		fprintf(f, " sink.name = %s", encoded);
+	}
+	if ((str = pw_properties_get(module->props, "sample")) != NULL) {
+		spa_json_encode_string(encoded, sizeof(encoded), str);
+		fprintf(f, " sample.name = %s", encoded);
+	}
+	if ((str = pw_properties_get(module->props, "display")) != NULL) {
+		spa_json_encode_string(encoded, sizeof(encoded), str);
+		fprintf(f, " x11.display = %s", encoded);
+	}
+	if ((str = pw_properties_get(module->props, "xauthority")) != NULL) {
+		spa_json_encode_string(encoded, sizeof(encoded), str);
+		fprintf(f, " x11.xauthority = %s", encoded);
+	}
 	fprintf(f, " }");
 	fclose(f);