diff --git a/pipewire-jack/src/pipewire-jack.c b/pipewire-jack/src/pipewire-jack.c
index b2691913f..1ad0b2917 100644
--- a/pipewire-jack/src/pipewire-jack.c
+++ b/pipewire-jack/src/pipewire-jack.c
@@ -5338,7 +5338,7 @@ int jack_set_freewheel(jack_client_t* client, int onoff)
 	pw_thread_loop_lock(c->context.loop);
 	str = pw_properties_get(c->props, PW_KEY_NODE_GROUP);
 	if (str != NULL) {
-		char *p = strstr(str, ",pipewire.freewheel");
+		const char *p = strstr(str, ",pipewire.freewheel");
 		if (p == NULL)
 			p = strstr(str, "pipewire.freewheel");
 		if (p == NULL && onoff)
diff --git a/spa/plugins/alsa/acp/compat.h b/spa/plugins/alsa/acp/compat.h
index 7660e1c27..ae2057800 100644
--- a/spa/plugins/alsa/acp/compat.h
+++ b/spa/plugins/alsa/acp/compat.h
@@ -426,11 +426,11 @@ static PA_PRINTF_FUNC(1,0) inline char *pa_vsprintf_malloc(const char *fmt, va_l
 
 static inline char *pa_path_get_filename(const char *p)
 {
-    char *fn;
+    const char *fn;
     if (!p)
         return NULL;
     if ((fn = strrchr(p, PA_PATH_SEP_CHAR)))
-        return fn+1;
+        return (char*)(fn+1);
     return (char*) p;
 }
 
diff --git a/spa/plugins/bluez5/bluez5-dbus.c b/spa/plugins/bluez5/bluez5-dbus.c
index e4495f0e8..44935bb85 100644
--- a/spa/plugins/bluez5/bluez5-dbus.c
+++ b/spa/plugins/bluez5/bluez5-dbus.c
@@ -1102,7 +1102,7 @@ static struct spa_bt_adapter *adapter_find(struct spa_bt_monitor *monitor, const
 static int parse_modalias(const char *modalias, uint16_t *source, uint16_t *vendor,
 		uint16_t *product, uint16_t *version)
 {
-	char *pos;
+	const char *pos;
 	unsigned int src, i, j, k;
 
 	if (spa_strstartswith(modalias, "bluetooth:"))
diff --git a/spa/plugins/support/logger.c b/spa/plugins/support/logger.c
index c6e6ca4b8..b21490f0f 100644
--- a/spa/plugins/support/logger.c
+++ b/spa/plugins/support/logger.c
@@ -73,9 +73,9 @@ impl_log_logtv(void *object,
 	char timestamp[18] = {0};
 	char topicstr[32] = {0};
 	char filename[64] = {0};
-	char location[1000 + RESERVED_LENGTH], *p, *s;
+	char location[1000 + RESERVED_LENGTH], *p;
 	static const char * const levels[] = { "-", "E", "W", "I", "D", "T", "*T*" };
-	const char *prefix = "", *suffix = "";
+	const char *prefix = "", *suffix = "", *s;
 	int size, len;
 	bool do_trace;