diff --git a/include/boost/detail/cstdfloat_complex.hpp b/include/boost/detail/cstdfloat_complex.hpp
index 7a68907ea..5029ef7ea 100644
--- a/include/boost/detail/cstdfloat_complex.hpp
+++ b/include/boost/detail/cstdfloat_complex.hpp
@@ -7,6 +7,8 @@
 // or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
+// Implement quadruple-precision (and extended) support for <complex>.
+
 #ifndef _BOOST_CSTDFLOAT_COMPLEX_2014_02_15_HPP_
   #define _BOOST_CSTDFLOAT_COMPLEX_2014_02_15_HPP_
 
diff --git a/include/boost/detail/cstdfloat_iostream.hpp b/include/boost/detail/cstdfloat_iostream.hpp
index 2008516ff..28eb5b1e4 100644
--- a/include/boost/detail/cstdfloat_iostream.hpp
+++ b/include/boost/detail/cstdfloat_iostream.hpp
@@ -180,9 +180,9 @@
     const bool showpoint  = ((f & std::ios_base::showpoint)  == std::ios_base::showpoint);
     const bool showpos    = ((f & std::ios_base::showpos)    == std::ios_base::showpos);
 
-    const bool neg = str.size() && (str[0] == '-');
+    const bool b_neg = ((str.size() != 0U) && (str[0] == '-'));
 
-    if(neg)
+    if(b_neg)
     {
       str.erase(0, 1);
     }
@@ -219,7 +219,8 @@
           }
         }
       }
-      if(neg)
+
+      if(b_neg)
       {
         str.insert(0U, 1U, '-');
       }
@@ -272,7 +273,7 @@
     {
       if((1 + my_exp) > static_cast<int>(str.size()))
       {
-        // Just pad out the end with zeros:
+        // Just pad out the end with zeros.
         str.append(static_cast<size_type>((1 + my_exp) - static_cast<int>(str.size())), '0');
 
         if(showpoint || fixed)
@@ -338,7 +339,7 @@
       str.append(e);
     }
 
-    if(neg)
+    if(b_neg)
     {
       str.insert(0U, 1U, '-');
     }
diff --git a/include/boost/detail/cstdfloat_limits.hpp b/include/boost/detail/cstdfloat_limits.hpp
index 85b45dd5c..79aa1d34f 100644
--- a/include/boost/detail/cstdfloat_limits.hpp
+++ b/include/boost/detail/cstdfloat_limits.hpp
@@ -7,7 +7,7 @@
 // or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
-// Implement the basic parts of floating-point typedefs having specified widths.
+// Implement quadruple-precision std::numeric_limits<> support.
 
 #ifndef _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_
   #define _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_
diff --git a/include/boost/detail/cstdfloat_types.hpp b/include/boost/detail/cstdfloat_types.hpp
index e6089a1b3..cfeb0bd0d 100644
--- a/include/boost/detail/cstdfloat_types.hpp
+++ b/include/boost/detail/cstdfloat_types.hpp
@@ -7,7 +7,7 @@
 // or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
-// Implement the basic parts of floating-point typedefs having specified widths.
+// Implement the types for floating-point typedefs having specified widths.
 
 #ifndef _BOOST_CSTDFLOAT_TYPES_2014_01_09_HPP_
   #define _BOOST_CSTDFLOAT_TYPES_2014_01_09_HPP_