diff --git a/mps/code/commpost.nmk b/mps/code/commpost.nmk
index 1fe2aa9a444..8898f9435b6 100644
--- a/mps/code/commpost.nmk
+++ b/mps/code/commpost.nmk
@@ -272,9 +272,11 @@ $(PFM)\$(VARIETY)\mps.lib: $(MPMOBJ) $(AMCOBJ) $(LOOBJ) $(SNCOBJ) \
 # about the repetition of the object list.
 $(PFM)\$(VARIETY)\mpsdy.dll: $(PFM)\$(VARIETY)\mpslibcb.obj \
 	$(MPMOBJ) $(AMCOBJ) $(LOOBJ) $(SNCOBJ) \
-	$(MVFFOBJ) $(AMSOBJ) $(AWLOBJ) w3gen.def 
+	$(MVFFOBJ) $(AMSOBJ) $(AWLOBJ) w3gen.def \
+	mpslibcb.def
 	$(ECHO) $@
-	$(LINKER) $(LINKFLAGS) /def:w3gen.def /dll /OUT:$@ \
+	$(LINKER) $(LINKFLAGS) /def:w3gen.def \
+	  /def:mpslibcb.def /dll /OUT:$@ \
 	  $(PFM)\$(VARIETY)\mpslibcb.obj \
 	  $(MPMOBJ) $(AMCOBJ) $(LOOBJ) $(SNCOBJ) \
 	  $(MVFFOBJ) $(AMSOBJ) $(AWLOBJ)
diff --git a/mps/code/expgen.sh b/mps/code/expgen.sh
index bb63b328382..78fd5a29c0d 100755
--- a/mps/code/expgen.sh
+++ b/mps/code/expgen.sh
@@ -117,7 +117,8 @@ tu () {
 # followed by manual removal of mpsw3.h mpswin.h (which gcc on UNIX
 # cannot parse).  Also removed are mpsio.h mpslib.h as they defined
 # interfaces that mps _uses_ not defines.  Also removed is mpscmvff.h as
-# it does not get included in mps.lib
+# it does not get included in mps.lib.  Also removed is mpslibcb.h, 
+# which now has its own mpslibcb.def file (job002148).
 # The functions declared in mpsw3.h have to be added to the .def file by
 # hand later in this script.
 f='mps.h
@@ -129,7 +130,6 @@ mpscawl.h
 mpsclo.h
 mpscmv.h
 mpscsnc.h
-mpslibcb.h
 mpstd.h'
 
 tu $f
diff --git a/mps/code/mpslibcb.def b/mps/code/mpslibcb.def
new file mode 100644
index 00000000000..9b2f4e3b285
--- /dev/null
+++ b/mps/code/mpslibcb.def
@@ -0,0 +1,10 @@
+; $Header$
+; --- EXTERNAL MPS FUNCTIONS ---
+; This file tells the linker to export the mpslibcb functions from 
+; the MPS DLL.
+; This list is for the w3i3mv platform.
+;
+; This file was extracted by hand from expgen.sh; see MPS job002148.
+EXPORTS
+; mpslibcb.h
+mps_lib_callback_register
diff --git a/mps/code/w3gen.def b/mps/code/w3gen.def
index 986cb7c767e..660b2ba94f5 100644
--- a/mps/code/w3gen.def
+++ b/mps/code/w3gen.def
@@ -149,8 +149,6 @@ mps_mv_free_size
 mps_class_mv
 ; mpscsnc.h
 mps_class_snc
-; mpslibcb.h
-mps_lib_callback_register
 ; mpstd.h
 ; mpsw3.h - by hand
 mps_SEH_filter