diff --git a/include/future b/include/future
index 2d969df1..ff8e59b1 100644
--- a/include/future
+++ b/include/future
@@ -542,14 +542,14 @@ public:
         __state_ |= __future_attached;
     }
     _LIBCPP_INLINE_VISIBILITY
-    bool __has_future_attached() const {return __state_ & __future_attached;}
+    bool __has_future_attached() const {return (__state_ & __future_attached) != 0;}
 
     _LIBCPP_INLINE_VISIBILITY
     void __set_deferred() {__state_ |= deferred;}
 
     void __make_ready();
     _LIBCPP_INLINE_VISIBILITY
-    bool __is_ready() const {return __state_ & ready;}
+    bool __is_ready() const {return (__state_ & ready) != 0;}
 
     void set_value();
     void set_value_at_thread_exit();
diff --git a/include/locale b/include/locale
index 40e33c22..ab7a7d45 100644
--- a/include/locale
+++ b/include/locale
@@ -3331,7 +3331,7 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
             bool __more_needed = __trailing_sign ||
                                  (__p < 2)       ||
                                  (__p == 2 && __pat.field[3] != static_cast<char>(money_base::none));
-            bool __sb = __flags & ios_base::showbase;
+            bool __sb = (__flags & ios_base::showbase) != 0;
             if (__sb || __more_needed)
             {
                 typename string_type::const_iterator __sym_space_end = __sym.begin();
diff --git a/src/strstream.cpp b/src/strstream.cpp
index 08a78a74..c1965ea3 100644
--- a/src/strstream.cpp
+++ b/src/strstream.cpp
@@ -229,8 +229,8 @@ strstreambuf::pos_type
 strstreambuf::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which)
 {
     off_type __p(-1);
-    bool pos_in = __which & ios::in;
-    bool pos_out = __which & ios::out;
+    bool pos_in = (__which & ios::in) != 0;
+    bool pos_out = (__which & ios::out) != 0;
     bool legal = false;
     switch (__way)
     {
@@ -287,8 +287,8 @@ strstreambuf::pos_type
 strstreambuf::seekpos(pos_type __sp, ios_base::openmode __which)
 {
     off_type __p(-1);
-    bool pos_in = __which & ios::in;
-    bool pos_out = __which & ios::out;
+    bool pos_in = (__which & ios::in) != 0;
+    bool pos_out = (__which & ios::out) != 0;
     if (pos_in || pos_out)
     {
         if (!((pos_in && gptr() == nullptr) || (pos_out && pptr() == nullptr)))