diff --git a/include/boost/endian/conversion.hpp b/include/boost/endian/conversion.hpp
index 201558f..fc0e1a2 100644
--- a/include/boost/endian/conversion.hpp
+++ b/include/boost/endian/conversion.hpp
@@ -98,7 +98,7 @@ namespace endian
   //------------------------------------------------------------------------------------//
 
 
-  //  Q: What happended to bswap, htobe, and the other synonym functions based on names
+  //  Q: What happened to bswap, htobe, and the other synonym functions based on names
   //     popularized by BSD, OS X, and Linux?
   //  A: Turned out these may be implemented as macros on some systems. Ditto POSIX names
   //     for such functionality. Since macros would cause endless problems with functions
diff --git a/test/endian_operations_test.cpp b/test/endian_operations_test.cpp
index 3c3c53d..43a1943 100644
--- a/test/endian_operations_test.cpp
+++ b/test/endian_operations_test.cpp
@@ -12,7 +12,7 @@
 //  This test probes operator overloading, including interaction between
 //  operand types.
 
-//  See endian_test for tests of endianess correctness, size, and value.
+//  See endian_test for tests of endianness correctness, size, and value.
 
 #define BOOST_ENDIAN_LOG
 
diff --git a/test/endian_test.cpp b/test/endian_test.cpp
index 82f2092..3a8a371 100644
--- a/test/endian_test.cpp
+++ b/test/endian_test.cpp
@@ -9,7 +9,7 @@
 
 //----------------------------------------------------------------------------//
 
-//  This test probes for correct endianess, size, and value.
+//  This test probes for correct endianness, size, and value.
 
 //  See endian_operations_test for tests of operator correctness and interaction
 //  between operand types.