diff --git a/include/boost/config/suffix.hpp b/include/boost/config/suffix.hpp
index ff9e527b..4b2596ca 100644
--- a/include/boost/config/suffix.hpp
+++ b/include/boost/config/suffix.hpp
@@ -242,11 +242,11 @@
 //  This macro gets set if we have headers that fix the ABI,
 //  and prevent ODR violations when linking to external libraries:
 #if defined(BOOST_ABI_PREFIX) && defined(BOOST_ABI_SUFFIX) && !defined(BOOST_HAS_ABI_HEADERS)
-#  define BOST_HAS_ABI_HEADERS
+#  define BOOST_HAS_ABI_HEADERS
 #endif
 
-#if defined(BOST_HAS_ABI_HEADERS) && defined(BOOST_DISABLE_ABI_HEADERS)
-#  undef BOST_HAS_ABI_HEADERS
+#if defined(BOOST_HAS_ABI_HEADERS) && defined(BOOST_DISABLE_ABI_HEADERS)
+#  undef BOOST_HAS_ABI_HEADERS
 #endif
 
 //  BOOST_NO_STDC_NAMESPACE workaround  --------------------------------------//