diff --git a/src/utils.c b/src/utils.c
index 75a5970..fe60b3c 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -22,6 +22,7 @@
 #include "ethUtils.h"
 #include "uint256.h"
 #include "tokens.h"
+#include "utils.h"
 
 static const unsigned char hex_digits[] =
     {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
@@ -98,10 +99,10 @@ bool uint256_to_decimal(const uint8_t *value, char *out, size_t out_len) {
     return true;
 }
 
-void amountToString(uint8_t *amount,
-                    uint8_t amount_size,
+void amountToString(const uint8_t *amount,
+                    uint8_t amount_size __attribute__((unused)),
                     uint8_t decimals,
-                    char *ticker,
+                    const char *ticker,
                     char *out_buffer,
                     uint8_t out_buffer_size) {
     char tmp_buffer[100];
diff --git a/src/utils.h b/src/utils.h
index 05b7990..fb40d92 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -34,10 +34,10 @@ uint32_t u32_from_BE(uint8_t* in, uint8_t size, bool strict);
 
 bool uint256_to_decimal(const uint8_t* value, char* out, size_t out_len);
 
-void amountToString(uint8_t* amount,
+void amountToString(const uint8_t* amount,
                     uint8_t amount_len,
                     uint8_t decimals,
-                    char* ticker,
+                    const char* ticker,
                     char* out_buffer,
                     uint8_t out_buffer_size);