diff --git a/libs/sofia-sip/open_c/group/bld.inf b/libs/sofia-sip/open_c/group/bld.inf
index 2bd276f85f..8fd6789681 100644
--- a/libs/sofia-sip/open_c/group/bld.inf
+++ b/libs/sofia-sip/open_c/group/bld.inf
@@ -87,6 +87,7 @@ PRJ_EXPORTS
 ../../libsofia-sip-ua/su/sofia-sip/htable2.h \epoc32\include\osextensions\sofia-sip\htable2.h
 ../../libsofia-sip-ua/su/sofia-sip/rbtree.h \epoc32\include\osextensions\sofia-sip\rbtree.h
 ../../libsofia-sip-ua/su/sofia-sip/string0.h \epoc32\include\osextensions\sofia-sip\string0.h
+../../libsofia-sip-ua/su/sofia-sip/su_string.h \epoc32\include\osextensions\sofia-sip\su_string.h
 ../../libsofia-sip-ua/su/sofia-sip/su.h \epoc32\include\osextensions\sofia-sip\su.h
 ../../libsofia-sip-ua/su/sofia-sip/su_addrinfo.h \epoc32\include\osextensions\sofia-sip\su_addrinfo.h
 ../../libsofia-sip-ua/su/sofia-sip/su_alloc.h \epoc32\include\osextensions\sofia-sip\su_alloc.h
diff --git a/libs/sofia-sip/open_c/group/libsofia-sip-ua.mmp b/libs/sofia-sip/open_c/group/libsofia-sip-ua.mmp
index c8ea95ddfe..2e20265cdd 100644
--- a/libs/sofia-sip/open_c/group/libsofia-sip-ua.mmp
+++ b/libs/sofia-sip/open_c/group/libsofia-sip-ua.mmp
@@ -64,7 +64,7 @@ SOURCE          memspn.c
 SOURCE          memcspn.c
 SOURCE          string0.c
 SOURCE          strtoull.c
-SOURCE          strcasestr.c
+SOURCE          su_string.c
 SOURCE          getopt.c
 SOURCE          poll.c