diff --git a/Makefile.in b/Makefile.in
index d995328..5c17e11 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -108,7 +108,7 @@ CFLAGS_DEFAULT	= @CFLAGS_DEFAULT@
 CFLAGS_WARNING	= @CFLAGS_WARNING@
 CLEANFILES	= @CLEANFILES@
 EXEEXT		= @EXEEXT@
-LDFLAGS_DEFAULT	= @LDFLAGS_DEFAULT@
+LDFLAGS_DEFAULT	= @LDFLAGS_DEFAULT@ -Wl,-soname,libtdom$(PACKAGE_VERSION).so
 MAKE_LIB	= @MAKE_LIB@
 MAKE_SHARED_LIB	= @MAKE_SHARED_LIB@
 MAKE_STATIC_LIB	= @MAKE_STATIC_LIB@
diff --git a/extensions/tnc/Makefile.in b/extensions/tnc/Makefile.in
index f8a332c..01e0ef0 100644
--- a/extensions/tnc/Makefile.in
+++ b/extensions/tnc/Makefile.in
@@ -98,7 +98,7 @@ CFLAGS_DEFAULT	= @CFLAGS_DEFAULT@
 CFLAGS_WARNING	= @CFLAGS_WARNING@
 CLEANFILES	= @CLEANFILES@
 EXEEXT		= @EXEEXT@
-LDFLAGS_DEFAULT	= @LDFLAGS_DEFAULT@
+LDFLAGS_DEFAULT	= @LDFLAGS_DEFAULT@ -Wl,-soname,libtnc$(PACKAGE_VERSION).so
 MAKE_LIB	= @MAKE_LIB@
 MAKE_SHARED_LIB	= @MAKE_SHARED_LIB@
 MAKE_STATIC_LIB	= @MAKE_STATIC_LIB@