diff --git a/include/crypto.h b/include/crypto.h
index c6ef173..8619631 100644
--- a/include/crypto.h
+++ b/include/crypto.h
@@ -30,6 +30,8 @@ extern "C" {
 #define WHY2_SUM_BASE_PRIME 31 //PRIME FOR SUM BASE
 #define WHY2_SUM_MOD_PRIME 4294967295UL //PRIME FOR SUM MODULUS; 2^32 - 1
 
+#define WHY2_PADDING_NONZERO_TRIES 1024 //HOW MANY RANDOM NUMBERS TO TRY TO GENERATE WHEN PREVENTING 0s
+
 //FUNCTIONS
 unsigned long long why2_sum_segment(char *input); //CALCULATE SUM++ FOR input; USED FOR PADDING SEED
 ssize_t why2_random(void *dest, size_t size); //WRITE CRYPTO-SECURE RANDOM NUMBER INTO dest