diff --git a/include/boost/predef/platform/windows_desktop.h b/include/boost/predef/platform/windows_desktop.h
index 2fd7d5d..62719b4 100644
--- a/include/boost/predef/platform/windows_desktop.h
+++ b/include/boost/predef/platform/windows_desktop.h
@@ -33,7 +33,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
  
 #if BOOST_PLAT_WINDOWS_DESKTOP
-#   define BOOST_PLAT_WINDOWS_DESKTOP_AVALIABLE
+#   define BOOST_PLAT_WINDOWS_DESKTOP_AVAILABLE
 #   include <boost/predef/detail/platform_detected.h>
 #endif
 
diff --git a/include/boost/predef/platform/windows_phone.h b/include/boost/predef/platform/windows_phone.h
index 495c918..df583ad 100644
--- a/include/boost/predef/platform/windows_phone.h
+++ b/include/boost/predef/platform/windows_phone.h
@@ -31,7 +31,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
  
 #if BOOST_PLAT_WINDOWS_PHONE
-#   define BOOST_PLAT_WINDOWS_PHONE_AVALIABLE
+#   define BOOST_PLAT_WINDOWS_PHONE_AVAILABLE
 #   include <boost/predef/detail/platform_detected.h>
 #endif
 
diff --git a/include/boost/predef/platform/windows_runtime.h b/include/boost/predef/platform/windows_runtime.h
index 902428e..03be514 100644
--- a/include/boost/predef/platform/windows_runtime.h
+++ b/include/boost/predef/platform/windows_runtime.h
@@ -33,7 +33,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
  
 #if BOOST_PLAT_WINDOWS_RUNTIME
-#   define BOOST_PLAT_WINDOWS_RUNTIME_AVALIABLE
+#   define BOOST_PLAT_WINDOWS_RUNTIME_AVAILABLE
 #   include <boost/predef/detail/platform_detected.h>
 #endif
 
diff --git a/include/boost/predef/platform/windows_store.h b/include/boost/predef/platform/windows_store.h
index d65821c..a34968b 100644
--- a/include/boost/predef/platform/windows_store.h
+++ b/include/boost/predef/platform/windows_store.h
@@ -31,7 +31,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 #endif
  
 #if BOOST_PLAT_WINDOWS_STORE
-#   define BOOST_PLAT_WINDOWS_STORE_AVALIABLE
+#   define BOOST_PLAT_WINDOWS_STORE_AVAILABLE
 #   include <boost/predef/detail/platform_detected.h>
 #endif