diff --git a/doc/src/history.adoc b/doc/src/history.adoc
index 0d56386dad..65671e552f 100644
--- a/doc/src/history.adoc
+++ b/doc/src/history.adoc
@@ -1,7 +1,7 @@
 [[b2.history]]
 = History
 
-== Version 5.1.0
+== Version 5.0.1
 
 * Fix compile errors for older versions of GCC and Clang toolset for the engine.
   We now support building the engine with GCC 4.7 and Clang 3.6 onward.
diff --git a/src/build/version.jam b/src/build/version.jam
index 9b1d261fb0..bf5a3282af 100644
--- a/src/build/version.jam
+++ b/src/build/version.jam
@@ -9,8 +9,8 @@ import numbers ;
 
 # Mirror engine JAM_VERSION
 .major = 5 ;
-.minor = 1 ;
-.patch = 0 ;
+.minor = 0 ;
+.patch = 1 ;
 
 
 rule build ( )
diff --git a/src/engine/patchlevel.h b/src/engine/patchlevel.h
index 56a68e8c5a..9f0fdd4a13 100644
--- a/src/engine/patchlevel.h
+++ b/src/engine/patchlevel.h
@@ -13,5 +13,5 @@ Distributed under the Boost Software License, Version 1.0.
 */
 
 #define VERSION_MAJOR 5
-#define VERSION_MINOR 1
-#define VERSION_PATCH 0
+#define VERSION_MINOR 0
+#define VERSION_PATCH 1