diff --git a/tests/src/helpers.c b/tests/src/helpers.c
index 5f12501..f0c27c3 100644
--- a/tests/src/helpers.c
+++ b/tests/src/helpers.c
@@ -130,7 +130,8 @@
     return( obuf );
 }
 
-int hexcmp( uint8_t * a, uint8_t * b, uint32_t a_len, uint32_t b_len )
+int mbedtls_test_hexcmp( uint8_t * a, uint8_t * b,
+                         uint32_t a_len, uint32_t b_len )
 {
     int ret = 0;
     uint32_t i = 0;