diff --git a/include/boost/circular_buffer/debug.hpp b/include/boost/circular_buffer/debug.hpp
index 50a6839..de30366 100644
--- a/include/boost/circular_buffer/debug.hpp
+++ b/include/boost/circular_buffer/debug.hpp
@@ -121,7 +121,7 @@ public:
     */
     void unregister_iterator(const debug_iterator_base* it) const {
         const debug_iterator_base* previous = 0;
-        for (const debug_iterator_base* p = m_iterators; p != it; previous = p, p = p->next());
+        for (const debug_iterator_base* p = m_iterators; p != it; previous = p, p = p->next()) {}
         remove(it, previous);
     }
 
diff --git a/include/boost/circular_buffer/space_optimized.hpp b/include/boost/circular_buffer/space_optimized.hpp
index 573e57f..6ba6800 100644
--- a/include/boost/circular_buffer/space_optimized.hpp
+++ b/include/boost/circular_buffer/space_optimized.hpp
@@ -1230,7 +1230,7 @@ private:
         if (new_size > new_capacity) {
             if (new_capacity == 0)
                 new_capacity = 1;
-            for (; new_size > new_capacity; new_capacity *= 2);
+            for (; new_size > new_capacity; new_capacity *= 2) {}
             circular_buffer<T, Alloc>::set_capacity(
                 ensure_reserve(new_capacity, new_size));
         }