diff --git a/elfutils.changes b/elfutils.changes
index f5df862..55bfcb8 100644
--- a/elfutils.changes
+++ b/elfutils.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue May  7 07:49:14 UTC 2019 - Martin Liška <mliska@suse.cz>
+
+- Add gcc9-tests-Don-t-printf-a-known-NULL-symname.patch in order to
+  fix boo#1120864.
+
 -------------------------------------------------------------------
 Tue Feb 19 10:22:29 UTC 2019 - Martin Liška <mliska@suse.cz>
 
diff --git a/elfutils.spec b/elfutils.spec
index 135baf2..2a1aee2 100644
--- a/elfutils.spec
+++ b/elfutils.spec
@@ -33,6 +33,7 @@ Source3:        %{name}.changes
 Source5:        %{name}.keyring
 Patch1:         disable-tests-with-ptrace.patch
 Patch2:         cfi-fix.patch
+Patch3:         gcc9-tests-Don-t-printf-a-known-NULL-symname.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -137,6 +138,7 @@ applications that require libdw.
 %patch1 -p1
 %endif
 %patch2 -p1
+%patch3 -p1
 
 %build
 # Change DATE/TIME macros to use last change time of elfutils.changes
diff --git a/gcc9-tests-Don-t-printf-a-known-NULL-symname.patch b/gcc9-tests-Don-t-printf-a-known-NULL-symname.patch
new file mode 100644
index 0000000..964da15
--- /dev/null
+++ b/gcc9-tests-Don-t-printf-a-known-NULL-symname.patch
@@ -0,0 +1,30 @@
+From 6978871366465aac849a303b2ea05ff5ab602261 Mon Sep 17 00:00:00 2001
+From: Mark Wielaard <mark@klomp.org>
+Date: Tue, 30 Apr 2019 20:36:39 +0200
+Subject: [PATCH] tests: Don't printf a known NULL symname.
+
+GCC9 on 32bit systems might warn about '%s' directive argument is null
+for symname in backtrace.c. Just check whether symname is NULL.
+
+Signed-off-by: Mark Wielaard <mark@klomp.org>
+---
+ tests/ChangeLog   | 4 ++++
+ tests/backtrace.c | 2 +-
+ 2 files changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/tests/backtrace.c b/tests/backtrace.c
+index ecf55830..36c8b8c4 100644
+--- a/tests/backtrace.c
++++ b/tests/backtrace.c
+@@ -185,7 +185,7 @@ frame_callback (Dwfl_Frame *state, void *frame_arg)
+     symname = dwfl_module_addrname (mod, pc_adjusted);
+ 
+   printf ("#%2d %#" PRIx64 "%4s\t%s\n", *framenop, (uint64_t) pc,
+-	  ! isactivation ? "- 1" : "", symname);
++	  ! isactivation ? "- 1" : "", symname ?: "<null>");
+   pid_t tid = dwfl_thread_tid (thread);
+   callback_verify (tid, *framenop, pc, symname, dwfl);
+   (*framenop)++;
+-- 
+2.21.0
+