diff --git a/boot/image-fit-sig.c b/boot/image-fit-sig.c
index 9b1d38b20a..495d7768f6 100644
--- a/boot/image-fit-sig.c
+++ b/boot/image-fit-sig.c
@@ -67,7 +67,7 @@ static int fit_image_setup_verify(struct image_sign_info *info,
 				  const void *fit, int noffset,
 				  int required_keynode, char **err_msgp)
 {
-	char *algo_name;
+	const char *algo_name;
 	const char *padding_name;
 
 	if (fdt_totalsize(fit) > CONFIG_VAL(FIT_SIGNATURE_MAX_SIZE)) {
diff --git a/boot/image-fit.c b/boot/image-fit.c
index f6594e065c..85a6f223c8 100644
--- a/boot/image-fit.c
+++ b/boot/image-fit.c
@@ -191,7 +191,7 @@ static void fit_image_print_data(const void *fit, int noffset, const char *p,
 	const char *keyname;
 	uint8_t *value;
 	int value_len;
-	char *algo;
+	const char *algo;
 	const char *padding;
 	bool required;
 	int ret, i;
@@ -1063,11 +1063,11 @@ int fit_image_get_data_and_size(const void *fit, int noffset,
  *     0, on success
  *     -1, on failure
  */
-int fit_image_hash_get_algo(const void *fit, int noffset, char **algo)
+int fit_image_hash_get_algo(const void *fit, int noffset, const char **algo)
 {
 	int len;
 
-	*algo = (char *)fdt_getprop(fit, noffset, FIT_ALGO_PROP, &len);
+	*algo = (const char *)fdt_getprop(fit, noffset, FIT_ALGO_PROP, &len);
 	if (*algo == NULL) {
 		fit_get_debug(fit, noffset, FIT_ALGO_PROP, len);
 		return -1;
@@ -1265,7 +1265,7 @@ static int fit_image_check_hash(const void *fit, int noffset, const void *data,
 {
 	uint8_t value[FIT_MAX_HASH_LEN];
 	int value_len;
-	char *algo;
+	const char *algo;
 	uint8_t *fit_value;
 	int fit_value_len;
 	int ignore;
diff --git a/include/image.h b/include/image.h
index 1cdc70faee..7be6f11f61 100644
--- a/include/image.h
+++ b/include/image.h
@@ -1011,7 +1011,7 @@ int fit_image_get_data_size_unciphered(const void *fit, int noffset,
 int fit_image_get_data_and_size(const void *fit, int noffset,
 				const void **data, size_t *size);
 
-int fit_image_hash_get_algo(const void *fit, int noffset, char **algo);
+int fit_image_hash_get_algo(const void *fit, int noffset, const char **algo);
 int fit_image_hash_get_value(const void *fit, int noffset, uint8_t **value,
 				int *value_len);
 
diff --git a/tools/image-host.c b/tools/image-host.c
index 945571f584..5b814ce715 100644
--- a/tools/image-host.c
+++ b/tools/image-host.c
@@ -63,7 +63,7 @@ static int fit_image_process_hash(void *fit, const char *image_name,
 	uint8_t value[FIT_MAX_HASH_LEN];
 	const char *node_name;
 	int value_len;
-	char *algo;
+	const char *algo;
 	int ret;
 
 	node_name = fit_get_name(fit, noffset, NULL);
@@ -160,7 +160,7 @@ static int fit_image_setup_sig(struct image_sign_info *info,
 		const char *engine_id)
 {
 	const char *node_name;
-	char *algo_name;
+	const char *algo_name;
 	const char *padding_name;
 
 	node_name = fit_get_name(fit, noffset, NULL);