diff --git a/library/constant_time.c b/library/constant_time.c
index af385cd..32c0e5a 100644
--- a/library/constant_time.c
+++ b/library/constant_time.c
@@ -327,7 +327,7 @@
 
 #if defined(MBEDTLS_PKCS1_V15) && defined(MBEDTLS_RSA_C) && !defined(MBEDTLS_RSA_ALT)
 
-void mbedtls_ct_mem_move_to_left(void *start,
+void mbedtls_ct_memmove_left(void *start,
                                  size_t total,
                                  size_t offset)
 {