diff --git a/Sheet5/mainEx6.cpp b/Sheet5/mainEx6.cpp
index c23aa85..233acb0 100644
--- a/Sheet5/mainEx6.cpp
+++ b/Sheet5/mainEx6.cpp
@@ -48,7 +48,7 @@ int main()
     bool same = true;
     if (K_atomic.val.size() == K_noatom.val.size()) {
         for (size_t i = 0; i < K_atomic.val.size(); ++i) {
-            if (std::fabs(K_atomic.val[i] - K_noatom.val[i]) > 1e-12) {
+            if (std::abs(K_atomic.val[i] - K_noatom.val[i]) > 1e-12) { //it was Fabs, changed it to abs
                 same = false; break;
             }
         }