--- a/win32/scintilla.mak
+++ b/win32/scintilla.mak
@@ -164,6 +164,7 @@
 	$(DIR_O)\LexSpecman.obj \
 	$(DIR_O)\LexSpice.obj \
 	$(DIR_O)\LexSQL.obj \
+	$(DIR_O)\LexSTTXT.obj \
 	$(DIR_O)\LexTACL.obj \
 	$(DIR_O)\LexTADS3.obj \
 	$(DIR_O)\LexTAL.obj \
@@ -445,6 +446,8 @@
 $(DIR_O)\LexSpice.obj: ..\lexers\LexSpice.cxx $(LEX_HEADERS)
 
 $(DIR_O)\LexSQL.obj: ..\lexers\LexSQL.cxx $(LEX_HEADERS)
+
+$(DIR_O)\LexSTTXT.obj: ..\lexers\LexSTTXT.cxx $(LEX_HEADERS)
 
 $(DIR_O)\LexTACL.obj: ..\lexers\LexTACL.cxx $(LEX_HEADERS)