diff --git a/tests/src/psa_crypto_helpers.c b/tests/src/psa_crypto_helpers.c
index 18eac06..52ff031 100644
--- a/tests/src/psa_crypto_helpers.c
+++ b/tests/src/psa_crypto_helpers.c
@@ -149,7 +149,7 @@
     }
 }
 
-uint64_t parse_binary_string(data_t *bin_string)
+uint64_t mbedtls_test_parse_binary_string(data_t *bin_string)
 {
     uint64_t result = 0;
     TEST_LE_U(bin_string->len, 8);