diff --git a/stlport.jam b/stlport.jam
index 7104d43ad..5c2d68bd0 100644
--- a/stlport.jam
+++ b/stlport.jam
@@ -92,7 +92,6 @@ flags $(CURR_TOOLSET) DEFINES <stlport-cstd-namespace>global : _STLP_VENDOR_GLOB
 flags $(CURR_TOOLSET) DEFINES <exception-handling>off : _STLP_NO_EXCEPTIONS=1 ;
 flags $(CURR_TOOLSET) DEFINES <stlport-debug-alloc>on : _STLP_DEBUG_ALLOC=1 ;
 flags $(CURR_TOOLSET) DEFINES <runtime-build>debug : _STLP_DEBUG=1 _STLP_DEBUG_UNINITIALIZED=1 ;
-flags $(CURR_TOOLSET) DEFINES <threading>single : _STLP_NO_THREADS=1 ;
 flags $(CURR_TOOLSET) DEFINES <runtime-link>dynamic : _STLP_USE_DYNAMIC_LIB=1 ;
 
 flags $(CURR_TOOLSET) FINDLIBS <stlport-iostream>on/<runtime-build>debug    : $(STLPORT_LIB_BASE_NAME)_stldebug ;
diff --git a/v1/stlport.jam b/v1/stlport.jam
index 7104d43ad..5c2d68bd0 100644
--- a/v1/stlport.jam
+++ b/v1/stlport.jam
@@ -92,7 +92,6 @@ flags $(CURR_TOOLSET) DEFINES <stlport-cstd-namespace>global : _STLP_VENDOR_GLOB
 flags $(CURR_TOOLSET) DEFINES <exception-handling>off : _STLP_NO_EXCEPTIONS=1 ;
 flags $(CURR_TOOLSET) DEFINES <stlport-debug-alloc>on : _STLP_DEBUG_ALLOC=1 ;
 flags $(CURR_TOOLSET) DEFINES <runtime-build>debug : _STLP_DEBUG=1 _STLP_DEBUG_UNINITIALIZED=1 ;
-flags $(CURR_TOOLSET) DEFINES <threading>single : _STLP_NO_THREADS=1 ;
 flags $(CURR_TOOLSET) DEFINES <runtime-link>dynamic : _STLP_USE_DYNAMIC_LIB=1 ;
 
 flags $(CURR_TOOLSET) FINDLIBS <stlport-iostream>on/<runtime-build>debug    : $(STLPORT_LIB_BASE_NAME)_stldebug ;