diff --git a/src/benchmark_register.h b/src/benchmark_register.h
index e0ace51ef..af644f53d 100644
--- a/src/benchmark_register.h
+++ b/src/benchmark_register.h
@@ -34,7 +34,7 @@ typename std::vector<T>::iterator AddPowers(std::vector<T>* dst, T lo, T hi,
     if (i > kmax / mult) break;
   }
 
-  return dst->begin() + static_cast<int>(start_offset);
+  return dst->begin() + start_offset;
 }
 
 template <typename T>
diff --git a/src/complexity.cc b/src/complexity.cc
index 8fa3f073a..952628ea7 100644
--- a/src/complexity.cc
+++ b/src/complexity.cc
@@ -34,9 +34,13 @@ BigOFunc* FittingCurve(BigO complexity) {
     case oN:
       return [](IterationCount n) -> double { return static_cast<double>(n); };
     case oNSquared:
-      return [](IterationCount n) -> double { return std::pow(n, 2); };
+      return [](IterationCount n) -> double {
+        return std::pow(static_cast<double>(n), 2);
+      };
     case oNCubed:
-      return [](IterationCount n) -> double { return std::pow(n, 3); };
+      return [](IterationCount n) -> double {
+        return std::pow(static_cast<double>(n), 3);
+      };
     case oLogN:
       return [](IterationCount n) -> double {
         return std::log2(static_cast<double>(n));