diff --git a/integer.cpp b/integer.cpp
index c5ade04..46324a2 100644
--- a/integer.cpp
+++ b/integer.cpp
@@ -136,7 +136,7 @@ public:
   friend Integer &abs_sub(Integer &lhs, Integer const &rhs) {
     assert(abs_lt(rhs, lhs));
     auto r_size = rhs.true_size();
-    auto t_size = r_size + (lhs.true_size() > r_size ? 1 : 0);
+    auto t_size = lhs.true_size();
     bool overflow = false;
     for (std::size_t i = 0; i < t_size; i++) {
       byte to_sub = 0;
@@ -144,11 +144,11 @@ public:
       overflow = false;
       if (r_size > i) {
         to_sub = rhs.bytes[i];
-        if (to_sub + overflow_handle > lhs.bytes[i] ||
-            // overflow detection
-            (to_sub + overflow_handle == 0 && to_sub != 0)) {
-          overflow = true;
-        }
+      }
+      if (to_sub + overflow_handle > lhs.bytes[i] ||
+          // overflow detection
+          (to_sub + overflow_handle == 0 && to_sub != 0)) {
+        overflow = true;
       }
       lhs.bytes[i] -= to_sub + overflow_handle;
     }
@@ -319,7 +319,7 @@ int main(void) {
   }
   for (std::size_t i = 0; i <= 4500; i++) {
     Integer n = i;
-    std::cout << n << std::endl;
+    // std::cout << n << std::endl;
     Integer base_n = n;
     n *= 1;
     assert(n == base_n);