diff --git a/library/constant_time.c b/library/constant_time.c
index c86316b..e11d88e 100644
--- a/library/constant_time.c
+++ b/library/constant_time.c
@@ -126,7 +126,7 @@
         for (size_t n = 0; n < total - 1; n++) {
             unsigned char current = buf[n];
             unsigned char next    = buf[n+1];
-            buf[n] = mbedtls_ct_uint_if_new(no_op, current, next);
+            buf[n] = mbedtls_ct_uint_if(no_op, current, next);
         }
         buf[total-1] = mbedtls_ct_uint_if0(no_op, buf[total-1]);
     }