diff --git a/foma-fix-sizeof.patch b/foma-fix-sizeof.patch
new file mode 100644
index 0000000..004585b
--- /dev/null
+++ b/foma-fix-sizeof.patch
@@ -0,0 +1,16 @@
+https://bugzilla.opensuse.org/show_bug.cgi?id=1109949
+https://github.com/mhulden/foma/pull/78
+
+Index: foma-0.9.18+git20170507.07bb944/foma/rewrite.c
+===================================================================
+--- foma-0.9.18+git20170507.07bb944.orig/foma/rewrite.c
++++ foma-0.9.18+git20170507.07bb944/foma/rewrite.c
+@@ -103,7 +103,7 @@ struct fsm *fsm_rewrite(struct rewrite_s
+     rb = xxcalloc(1, sizeof(struct rewrite_batch));
+     rb->rewrite_set = all_rules;
+     rb->num_rules = num_rules;
+-    rb->namestrings = xxmalloc(sizeof rb->namestrings * num_rules);
++    rb->namestrings = xxmalloc(sizeof *rb->namestrings * num_rules);
+     for (i = 0; i < rb->num_rules; i++) {
+ 	sprintf(rb->namestrings[i], "@#%04i@", i+1);
+     }
diff --git a/foma.changes b/foma.changes
index 82460d0..d0345fb 100644
--- a/foma.changes
+++ b/foma.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Sep 27 09:00:24 UTC 2018 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add foma-fix-sizeof.patch to fix segfault on 32-bit (boo#1109949)
+
 -------------------------------------------------------------------
 Thu Sep 27 07:28:30 UTC 2018 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/foma.spec b/foma.spec
index a64ec8e..46ad026 100644
--- a/foma.spec
+++ b/foma.spec
@@ -27,6 +27,7 @@ URL:            https://fomafst.github.io/
 # Source must be from git tarball has different license than git, no idea why
 Source0:        foma-%{version}.tar.xz
 Patch0:         foma-harden-build.patch
+Patch1:         foma-fix-sizeof.patch
 BuildRequires:  bison
 BuildRequires:  flex
 BuildRequires:  ncurses-devel
@@ -64,6 +65,7 @@ Finite-state C library development files and headers for %{name}.
 %prep
 %setup -q -n %{name}-%{version}/%{name}
 %patch0 -p2
+%patch1 -p2
 sed -i '/^CFLAGS/c\CFLAGS = %{optflags} -Wl,--as-needed -D_GNU_SOURCE -std=c99 -fvisibility=hidden -fPIC' Makefile
 sed -i '/^LDFLAGS/c\LDFLAGS = -lreadline -lz -lreadline -fpic' Makefile
 sed -i '/^FLOOKUPLDFLAGS/c\FLOOKUPLDFLAGS = libfoma.a -lz -fpic' Makefile