diff --git a/appveyor.yml b/appveyor.yml
index e35a4609..13be7fa4 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,7 +12,7 @@ platform:
 
 environment:
   matrix:
-#    - compiler: msvc-12-seh
+    - compiler: msvc-12-seh
     - compiler: msvc-14-seh
     - compiler: gcc-4.9.2-posix
 #    - compiler: gcc-4.8.4-posix
diff --git a/src/complexity.cc b/src/complexity.cc
index b42bd38c..7d557943 100644
--- a/src/complexity.cc
+++ b/src/complexity.cc
@@ -31,9 +31,9 @@ BigOFunc* FittingCurve(BigO complexity) {
     case oN:
       return [](int n) -> double { return n; };
     case oNSquared:
-      return [](int n) -> double { return n * n; };
+      return [](int n) -> double { return std::pow(n, 2); };
     case oNCubed:
-      return [](int n) -> double { return n * n * n; };
+      return [](int n) -> double { return std::pow(n, 3); };
     case oLogN:
       return [](int n) { return std::log2(n); };
     case oNLogN: