diff --git a/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.cpp b/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.cpp
index dcceb348d..d73a2360e 100644
--- a/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.cpp
+++ b/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.cpp
@@ -383,7 +383,7 @@ typename Slice<T>::iterator::difference_type
 Slice<T>::iterator::operator-(const iterator &other) const noexcept {
   auto diff = std::distance(static_cast<char *>(other.pos),
                             static_cast<char *>(this->pos));
-  return diff / this->stride;
+  return diff / static_cast<typename Slice<T>::iterator::difference_type>(this->stride);
 }
 
 template <typename T>
diff --git a/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.hpp b/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.hpp
index 1d7c9fefc..565828593 100644
--- a/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.hpp
+++ b/compilers/concrete-optimizer/concrete-optimizer-cpp/src/cpp/concrete-optimizer.hpp
@@ -384,7 +384,7 @@ typename Slice<T>::iterator::difference_type
 Slice<T>::iterator::operator-(const iterator &other) const noexcept {
   auto diff = std::distance(static_cast<char *>(other.pos),
                             static_cast<char *>(this->pos));
-  return diff / this->stride;
+  return diff / static_cast<typename Slice<T>::iterator::difference_type>(this->stride);
 }
 
 template <typename T>