diff --git a/src/engine/build.jam b/src/engine/build.jam
index 45e3efa54..fc6f76ae0 100644
--- a/src/engine/build.jam
+++ b/src/engine/build.jam
@@ -285,7 +285,6 @@ toolset sunpro cc : "-o " : -D
     :
     [ opt --release : -s -fast -xO4 ]
     [ opt --debug : -g ]
-    -xarch=generic
     -I$(--python-include) -I$(--extra-include)
     : -L$(--python-lib[1]) -l$(--python-lib[2]) ;
 ## Compaq Alpha CXX