diff --git a/iguana/exchanges/LP_privkey.c b/iguana/exchanges/LP_privkey.c
index 660c79290..077b880f2 100644
--- a/iguana/exchanges/LP_privkey.c
+++ b/iguana/exchanges/LP_privkey.c
@@ -227,7 +227,7 @@ int32_t LP_wifstr_valid(char *symbol,char *wifstr)
     }
     if ( n == 0 || A == 0 || a == 0 )
         return(0);
-    if ( A > 10*a || a < 10*A || n < 20*a || n < 20*A ) // unlikely it is a real wif
+    if ( A > 5*a || a < 5*A || n < a/20 || n < A/20 ) // unlikely it is a real wif
     {
         printf("reject wif %s due to n.%d a.%d A.%d\n",wifstr,n,a,A);
         return(0);