Index: tools/build/v2/tools/qt4.jam
===================================================================
RCS file: /cvsroot/boost/boost/tools/build/v2/tools/qt4.jam,v
retrieving revision 1.11
diff -u -r1.11 qt4.jam
@@ -202,7 +215,7 @@
             : <name>Qt3Support$(suffix_version) <variant>release
             :
             : # usage-requirements
-              <define>QT_COMPAT_LIB
+              <define>QT_QT3SUPPORT_LIB
               <define>QT3_SUPPORT
               <include>$(.prefix)/include/Qt3Support 
             ;
@@ -210,8 +223,8 @@
             : <name>Qt3Support$(suffix_debug)$(suffix_version) <variant>debug
             :
             : # usage-requirements
-              <define>QT_COMPAT_LIB
+              <define>QT_QT3SUPPORT_LIB
               <define>QT3_SUPPORT
               <include>$(.prefix)/include/Qt3Support 
             ;