diff --git a/library/cipher.c b/library/cipher.c
index d36d4d5..3274f38 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -957,7 +957,8 @@
     pad_idx = input_len - padding_len;
     for (i = 0; i < input_len - 1; i++) {
         mbedtls_ct_condition_t is_padding = mbedtls_ct_uint_ge(i, pad_idx);
-        mbedtls_ct_condition_t nonzero_pad_byte = mbedtls_ct_uint_if_else_0(is_padding, mbedtls_ct_bool(input[i]));
+        mbedtls_ct_condition_t nonzero_pad_byte;
+        nonzero_pad_byte = mbedtls_ct_uint_if_else_0(is_padding, mbedtls_ct_bool(input[i]));
         bad = mbedtls_ct_bool_or(bad, nonzero_pad_byte);
     }