diff --git a/lib/isc/win32/libisc.def b/lib/isc/win32/libisc.def
index 4e5516ebef..da268a1a58 100644
--- a/lib/isc/win32/libisc.def
+++ b/lib/isc/win32/libisc.def
@@ -253,6 +253,7 @@ isc_mem_inuse
 isc_mem_ondestroy
 isc_mem_references
 isc_mem_setdestroycheck
+isc_mem_setname
 isc_mem_setquota
 isc_mem_setwater
 isc_mem_stats
@@ -311,6 +312,11 @@ isc_os_ncpus
 isc_parse_uint16
 isc_parse_uint32
 isc_parse_uint8
+isc_portset_addrange
+isc_portset_create
+isc_portset_destroy
+isc_portset_issset
+isc_portset_nports
 isc_quota_attach
 isc_quota_destroy
 isc_quota_detach
@@ -507,7 +513,6 @@ isc_win32os_versioncheck
 openlog
 syslog
 
-
 ; Exported Data
 
 EXPORTS
diff --git a/lib/isc/win32/libisc.dsp b/lib/isc/win32/libisc.dsp
index ec772883aa..437320a4a3 100644
--- a/lib/isc/win32/libisc.dsp
+++ b/lib/isc/win32/libisc.dsp
@@ -405,6 +405,10 @@ SOURCE=..\include\isc\parseint.h
 # End Source File
 # Begin Source File
 
+SOURCE=..\include\isc\portset.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\include\isc\os.h
 # End Source File
 # Begin Source File
@@ -673,6 +677,10 @@ SOURCE=..\parseint.c
 # End Source File
 # Begin Source File
 
+SOURCE=..\portset.c
+# End Source File
+# Begin Source File
+
 SOURCE=..\quota.c
 # End Source File
 # Begin Source File
diff --git a/lib/isc/win32/libisc.mak b/lib/isc/win32/libisc.mak
index f95b69078d..f69799184a 100644
--- a/lib/isc/win32/libisc.mak
+++ b/lib/isc/win32/libisc.mak
@@ -157,6 +157,8 @@ CLEAN :
 	-@erase "$(INTDIR)\ondestroy.obj"
 	-@erase "$(INTDIR)\os.obj"
 	-@erase "$(INTDIR)\parseint.obj"
+	-@erase "$(INTDIR)\portset.obj"
+	-@erase "$(INTDIR)\portset.obj"
 	-@erase "$(INTDIR)\quota.obj"
 	-@erase "$(INTDIR)\random.obj"
 	-@erase "$(INTDIR)\ratelimiter.obj"
@@ -272,6 +274,7 @@ LINK32_OBJS= \
 	"$(INTDIR)\taskpool.obj" \
 	"$(INTDIR)\timer.obj" \
 	"$(INTDIR)\parseint.obj" \
+	"$(INTDIR)\portset.obj" \
 	"$(INTDIR)\region.obj"
 
 "..\..\..\Build\Release\libisc.dll" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
@@ -380,6 +383,8 @@ CLEAN :
 	-@erase "$(INTDIR)\os.sbr"
 	-@erase "$(INTDIR)\parseint.obj"
 	-@erase "$(INTDIR)\parseint.sbr"
+	-@erase "$(INTDIR)\portset.obj"
+	-@erase "$(INTDIR)\portset.sbr"
 	-@erase "$(INTDIR)\quota.obj"
 	-@erase "$(INTDIR)\quota.sbr"
 	-@erase "$(INTDIR)\random.obj"
@@ -520,6 +525,7 @@ BSC32_SBRS= \
 	"$(INTDIR)\taskpool.sbr" \
 	"$(INTDIR)\timer.sbr" \
 	"$(INTDIR)\parseint.sbr" \
+	"$(INTDIR)\portset.sbr" \
 	"$(INTDIR)\region.sbr"
 
 "$(OUTDIR)\libisc.bsc" : "$(OUTDIR)" $(BSC32_SBRS)
@@ -601,6 +607,7 @@ LINK32_OBJS= \
 	"$(INTDIR)\taskpool.obj" \
 	"$(INTDIR)\timer.obj" \
 	"$(INTDIR)\parseint.obj" \
+	"$(INTDIR)\portset.obj" \
 	"$(INTDIR)\region.obj"
 
 "..\..\..\Build\Debug\libisc.dll" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
@@ -1572,6 +1579,24 @@ SOURCE=..\parseint.c
 	$(CPP) $(CPP_PROJ) $(SOURCE)
 
 
+!ENDIF 
+
+SOURCE=..\portset.c
+
+!IF  "$(CFG)" == "libisc - Win32 Release"
+
+
+"$(INTDIR)\portset.obj" : $(SOURCE) "$(INTDIR)"
+	$(CPP) $(CPP_PROJ) $(SOURCE)
+
+
+!ELSEIF  "$(CFG)" == "libisc - Win32 Debug"
+
+
+"$(INTDIR)\portset.obj"	"$(INTDIR)\portset.sbr" : $(SOURCE) "$(INTDIR)"
+	$(CPP) $(CPP_PROJ) $(SOURCE)
+
+
 !ENDIF 
 
 SOURCE=..\quota.c