diff --git a/mozilla-nss.changes b/mozilla-nss.changes
index 34c92b3..c1d030c 100644
--- a/mozilla-nss.changes
+++ b/mozilla-nss.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Mon Aug 22 12:54:15 UTC 2016 - wr@rosenauer.org
+
+- fix build on certain toolchains (nss-uninitialized.patch)
+  jarfile.c:805:13: error: 'it' may be used uninitialized in this
+  function [-Werror=maybe-uninitialized]
+
 -------------------------------------------------------------------
 Thu Aug  4 20:28:32 UTC 2016 - wr@rosenauer.org
 
diff --git a/mozilla-nss.spec b/mozilla-nss.spec
index 743594d..5e3f81c 100644
--- a/mozilla-nss.spec
+++ b/mozilla-nss.spec
@@ -51,6 +51,7 @@ Source9:        pkcs11.txt
 Source99:       %{name}.changes
 Patch1:         nss-opt.patch
 Patch2:         system-nspr.patch
+Patch3:         nss-uninitialized.patch
 Patch4:         nss-no-rpath.patch
 Patch5:         renegotiate-transitional.patch
 Patch6:         malloc.patch
@@ -169,6 +170,7 @@ Mozilla project.
 cd nss
 %patch1 -p1
 %patch2 -p1
+%patch3 -p1
 %patch4 -p1
 %patch5 -p1
 %if %suse_version > 1110
diff --git a/nss-uninitialized.patch b/nss-uninitialized.patch
new file mode 100644
index 0000000..edfbe58
--- /dev/null
+++ b/nss-uninitialized.patch
@@ -0,0 +1,22 @@
+diff --git a/lib/jar/jarfile.c b/lib/jar/jarfile.c
+--- a/lib/jar/jarfile.c
++++ b/lib/jar/jarfile.c
+@@ -652,17 +652,17 @@ jar_gen_index(JAR *jar, jarArch format, 
+  *  List the physical contents of a Phil Katz
+  *  style .ZIP file into the JAR linked list.
+  *
+  */
+ static int
+ jar_listzip(JAR *jar, JAR_FILE fp)
+ {
+     ZZLink *ent;
+-    JAR_Item *it;
++    JAR_Item *it = NULL;
+     JAR_Physical *phy = NULL;
+     struct ZipLocal *Local = PORT_ZNew(struct ZipLocal);
+     struct ZipCentral *Central = PORT_ZNew(struct ZipCentral);
+     struct ZipEnd *End = PORT_ZNew(struct ZipEnd);
+ 
+     int err = 0;
+     long pos = 0L;
+     unsigned int compression;