diff --git a/include/settings/settings.h b/include/settings/settings.h
index f2f4e43914a..6379597b171 100644
--- a/include/settings/settings.h
+++ b/include/settings/settings.h
@@ -74,7 +74,7 @@ struct settings_handler {
 	 * User might use it to apply setting to the application.
 	 */
 
-	int (*h_export)(int (*export_func)(const char *name, void *val,
+	int (*h_export)(int (*export_func)(const char *name, const void *val,
 					   size_t val_len));
 	/**< This gets called to dump all current settings items.
 	 *
@@ -139,7 +139,7 @@ int settings_save(void);
  *
  * @return 0 on success, non-zero on failure.
  */
-int settings_save_one(const char *name, void *value, size_t val_len);
+int settings_save_one(const char *name, const void *value, size_t val_len);
 
 /**
  * Delete a single serialized in persisted storage.
diff --git a/subsys/bluetooth/host/settings.c b/subsys/bluetooth/host/settings.c
index 0dcb92a69e5..e7ebe4ef879 100644
--- a/subsys/bluetooth/host/settings.c
+++ b/subsys/bluetooth/host/settings.c
@@ -240,7 +240,7 @@ static int commit(void)
 	return 0;
 }
 
-static int export(int (*export_func)(const char *name, void *val,
+static int export(int (*export_func)(const char *name, const void *val,
 				     size_t val_len))
 
 {
diff --git a/subsys/bluetooth/host/settings.h b/subsys/bluetooth/host/settings.h
index 27d3a8a6387..0f79afe2af7 100644
--- a/subsys/bluetooth/host/settings.h
+++ b/subsys/bluetooth/host/settings.h
@@ -9,8 +9,8 @@ struct bt_settings_handler {
 	int (*set)(int argc, char **argv, size_t len, settings_read_cb read_cb,
 		   void *cb_arg);
 	int (*commit)(void);
-	int (*export)(int (*func)(const char *name, void *val,
-				  size_t val_len));
+	int (*export)(int (*func)(const char *name,
+				  const void *val, size_t val_len));
 };
 
 #define BT_SETTINGS_DEFINE(_name, _set, _commit, _export)               \
diff --git a/subsys/settings/src/settings_store.c b/subsys/settings/src/settings_store.c
index 036484dc397..9128ea60e9d 100644
--- a/subsys/settings/src/settings_store.c
+++ b/subsys/settings/src/settings_store.c
@@ -60,7 +60,7 @@ int settings_load(void)
 /*
  * Append a single value to persisted config. Don't store duplicate value.
  */
-int settings_save_one(const char *name, void *value, size_t val_len)
+int settings_save_one(const char *name, const void *value, size_t val_len)
 {
 	struct settings_store *cs;
 
diff --git a/tests/subsys/settings/fcb/src/settings_test_compress_deleted.c b/tests/subsys/settings/fcb/src/settings_test_compress_deleted.c
index fb6e9f3c325..8e11e297ee0 100644
--- a/tests/subsys/settings/fcb/src/settings_test_compress_deleted.c
+++ b/tests/subsys/settings/fcb/src/settings_test_compress_deleted.c
@@ -28,7 +28,7 @@ struct deletable_s {
 
 u32_t val4v2;
 
-int c4_handle_export(int (*cb)(const char *name, void *value, size_t val_len));
+int c4_handle_export(int (*cb)(const char *name, const void *value, size_t val_len));
 
 struct settings_handler c4_test_handler = {
 	.name = "4",
@@ -38,7 +38,7 @@ struct settings_handler c4_test_handler = {
 	.h_export = c4_handle_export
 };
 
-int c4_handle_export(int (*cb)(const char *name, void *value, size_t val_len))
+int c4_handle_export(int (*cb)(const char *name, const void *value, size_t val_len))
 {
 	if (deletable_val.valid) {
 		(void)cb(NAME_DELETABLE, &deletable_val.val32,
diff --git a/tests/subsys/settings/fcb/src/settings_test_fcb.c b/tests/subsys/settings/fcb/src/settings_test_fcb.c
index 9e350bc681c..33a8d65db89 100644
--- a/tests/subsys/settings/fcb/src/settings_test_fcb.c
+++ b/tests/subsys/settings/fcb/src/settings_test_fcb.c
@@ -27,17 +27,20 @@ int c1_handle_get(int argc, char **argv, char *val, int val_len_max);
 int c1_handle_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 		  void *cb_arg);
 int c1_handle_commit(void);
-int c1_handle_export(int (*cb)(const char *name, void *value, size_t val_len));
+int c1_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len));
 
 int c2_handle_get(int argc, char **argv, char *val, int val_len_max);
 int c2_handle_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 		  void *cb_arg);
-int c2_handle_export(int (*cb)(const char *name, void *value, size_t val_len));
+int c2_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len));
 
 int c3_handle_get(int argc, char **argv, char *val, int val_len_max);
 int c3_handle_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 		  void *cb_arg);
-int c3_handle_export(int (*cb)(const char *name,  void *value, size_t val_len));
+int c3_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len));
 
 struct settings_handler c_test_handlers[] = {
 	{
@@ -122,7 +125,8 @@ int c1_handle_commit(void)
 	return 0;
 }
 
-int c1_handle_export(int (*cb)(const char *name, void *value, size_t val_len))
+int c1_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len))
 {
 	if (test_export_block) {
 		return 0;
@@ -269,7 +273,8 @@ int c2_handle_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 	return -ENOENT;
 }
 
-int c2_handle_export(int (*cb)(const char *name, void *value, size_t val_len))
+int c2_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len))
 {
 	int i;
 	char name[32];
@@ -310,7 +315,8 @@ int c3_handle_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 	return -ENOENT;
 }
 
-int c3_handle_export(int (*cb)(const char *name, void *value, size_t val_len))
+int c3_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len))
 {
 	(void)cb("3/v", &val32, sizeof(val32));
 
diff --git a/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c b/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c
index ef81c269b25..055b69e1e9f 100644
--- a/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c
+++ b/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c
@@ -29,8 +29,8 @@ static int c1_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 	return -ENOENT;
 }
 
-static int c1_export(int (*export_func)(const char *name, void *value,
-					size_t val_len))
+static int c1_export(int (*export_func)(const char *name,
+					const void *value, size_t val_len))
 {
 	(void)export_func("hello/val32", &val32, sizeof(val32));
 
diff --git a/tests/subsys/settings/nffs/src/settings_test_nffs.c b/tests/subsys/settings/nffs/src/settings_test_nffs.c
index 8b31ab2e40d..0b8359fbea3 100644
--- a/tests/subsys/settings/nffs/src/settings_test_nffs.c
+++ b/tests/subsys/settings/nffs/src/settings_test_nffs.c
@@ -26,7 +26,8 @@ int c1_handle_get(int argc, char **argv, char *val, int val_len_max);
 int c1_handle_set(int argc, char **argv, size_t len, settings_read_cb read_cb,
 		  void *cb_arg);
 int c1_handle_commit(void);
-int c1_handle_export(int (*cb)(const char *name, void *value, size_t val_len));
+int c1_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len));
 
 struct settings_handler c_test_handlers[] = {
 	{
@@ -108,7 +109,8 @@ int c1_handle_commit(void)
 	return 0;
 }
 
-int c1_handle_export(int (*cb)(const char *name, void *value, size_t val_len))
+int c1_handle_export(int (*cb)(const char *name,
+			       const void *value, size_t val_len))
 {
 	if (test_export_block) {
 		return 0;