diff --git a/unbound-1.4.15-version.patch b/unbound-1.4.15-version.patch
new file mode 100644
index 0000000..59ded33
--- /dev/null
+++ b/unbound-1.4.15-version.patch
@@ -0,0 +1,49 @@
+>From fe05ea0802ff3f2fd2f49ed0bb3f1f0f4542f196 Mon Sep 17 00:00:00 2001
+From: "Robert S. Edmonds" <edmonds@debian.org>
+Date: Sat, 28 Jan 2012 20:05:43 -0500
+Subject: [PATCH] Makefile.in: use -version-info, not -version-number
+
+from the libtool manual:
+
+    -version-info current[:revision[:age]]
+        If output-file is a libtool library, use interface version
+        information current, revision, and age to build it (see
+        Versioning). Do not use this flag to specify package release
+        information, rather see the -release flag.
+
+    -version-number major[:minor[:revision]]
+        If output-file is a libtool library, compute interface version
+        information so that the resulting library uses the specified
+        major, minor and revision numbers. This is designed to permit
+        libtool to be used with existing projects where identical
+        version numbers are already used across operating systems. New
+        projects should use the -version-info flag instead.
+---
+ Makefile.in |    4 ++--
+ 1 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/Makefile.in b/Makefile.in
+index bdd8dba..4c26f52 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -224,7 +224,7 @@ ALL_OBJ=$(COMMON_OBJ) $(UNITTEST_OBJ) $(DAEMON_OBJ) \
+ 
+ COMPILE=$(LIBTOOL) --tag=CC --mode=compile $(CC) $(CPPFLAGS) $(CFLAGS)
+ LINK=$(LIBTOOL) --tag=CC --mode=link $(CC) $(staticexe) $(RUNTIME_PATH) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS)
+-LINK_LIB=$(LIBTOOL) --tag=CC --mode=link $(CC) $(RUNTIME_PATH) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(staticexe) -version-number @LIBUNBOUND_CURRENT@:@LIBUNBOUND_REVISION@:@LIBUNBOUND_AGE@ -no-undefined
++LINK_LIB=$(LIBTOOL) --tag=CC --mode=link $(CC) $(RUNTIME_PATH) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(staticexe) -version-info @LIBUNBOUND_CURRENT@:@LIBUNBOUND_REVISION@:@LIBUNBOUND_AGE@ -no-undefined
+ 
+ .PHONY:	clean realclean doc lint all install uninstall tests test strip lib longtest longcheck check
+ 
+@@ -369,7 +369,7 @@ libunbound/python/libunbound_wrap.c:	$(srcdir)/libunbound/python/libunbound.i $(
+ 
+ # Pyunbound python unbound wrapper
+ _unbound.la:	libunbound_wrap.lo libunbound.la
+-	$(LIBTOOL) --tag=CC --mode=link $(CC) $(RUNTIME_PATH) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -module -version-number @LIBUNBOUND_CURRENT@:@LIBUNBOUND_REVISION@:@LIBUNBOUND_AGE@ -no-undefined -o $@ libunbound_wrap.lo -rpath $(PYTHON_SITE_PKG) L. -L.libs -lunbound $(LIBS)
++	$(LIBTOOL) --tag=CC --mode=link $(CC) $(RUNTIME_PATH) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -module -version-info @LIBUNBOUND_CURRENT@:@LIBUNBOUND_REVISION@:@LIBUNBOUND_AGE@ -no-undefined -o $@ libunbound_wrap.lo -rpath $(PYTHON_SITE_PKG) L. -L.libs -lunbound $(LIBS)
+ 
+ util/config_file.c:	util/configparser.h
+ util/configlexer.c:  $(srcdir)/util/configlexer.lex util/configparser.h
+-- 
+1.7.8.3
+
diff --git a/unbound.spec b/unbound.spec
index c82b836..71e2bad 100644
--- a/unbound.spec
+++ b/unbound.spec
@@ -8,7 +8,7 @@
 Summary: Validating, recursive, and caching DNS(SEC) resolver
 Name: unbound
 Version: 1.4.15
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: BSD
 Url: http://www.nlnetlabs.nl/unbound/
 Source: http://www.unbound.net/downloads/%{name}-%{version}.tar.gz
@@ -21,6 +21,7 @@ Source6: dlv.isc.org.key
 Source7: unbound-keygen.service
 Source8: tmpfiles-unbound.conf
 Patch1: unbound-1.2-glob.patch
+Patch2: unbound-1.4.15-version.patch
 
 Group: System Environment/Daemons
 BuildRequires: flex, openssl-devel , ldns-devel >= 1.5.0, 
@@ -93,6 +94,7 @@ Python modules and extensions for unbound
 %prep
 %setup -q 
 %patch1 -p1
+%patch2 -p1
 
 %build
 %configure  --with-ldns= --with-libevent --with-pthreads --with-ssl \
@@ -219,6 +221,9 @@ fi
 /bin/systemctl try-restart unbound-keygen.service >/dev/null 2>&1 || :
 
 %changelog
+* Wed Feb 01 2012 Paul Wouters <paul@nohats.ca> - 1.4.15-2
+- Patch for SONAME version (libtool's -version-number vs -version-info)
+
 * Fri Jan 27 2012 Paul Wouters <pwouters@redhat.com> - 1.4.15-1
 - Upgraded to 1.4.15
 - Updated unbound.conf to show how to configure listening on tls443