diff --git a/libs/sofia-sip/win32/build_sources.cmd b/libs/sofia-sip/win32/build_sources.cmd
index 0f740537a0..09dcb70acd 100644
--- a/libs/sofia-sip/win32/build_sources.cmd
+++ b/libs/sofia-sip/win32/build_sources.cmd
@@ -119,6 +119,8 @@
 %CHECK%
 %TAG_AWK% NO_DLL=1 %P%/url/url_tag.c  < NUL
 %CHECK%
+%TAG_AWK% NO_DLL=1 %P%/su/su_tag.c  < NUL
+%CHECK%
 
 @GOTO end
 :failed