diff --git a/sources/main.cpp b/sources/main.cpp
index 402579b..7da1d13 100644
--- a/sources/main.cpp
+++ b/sources/main.cpp
@@ -76,8 +76,8 @@ inline void bitwiseInverse(const unsigned char* key, Key& inverted) noexcept {
 }
 inline unsigned char getOnes(const Key& value) noexcept {
     int leadOnes = 0;
-    for (unsigned char i = 0; i < 17; i++) {
-        if (value[0] != 0xFF) return leadOnes;
+    for (unsigned char i = 0; i < 32; i++) {
+        if (value[0] != 0xFF && value[1] != 0xFF) return leadOnes;
         if (value[i] == 0xFF) {
             leadOnes += 8;
         } else {