diff --git a/gambit-c.spec b/gambit-c.spec
index 4ce2d62..48698ad 100644
--- a/gambit-c.spec
+++ b/gambit-c.spec
@@ -14,9 +14,14 @@
 %endif # ppc64
 %endif # el6
 
+# package build runs OOM on s390
+%ifarch s390
+%global optflags %(echo %{optflags} | sed 's/-g /-g1 /')
+%endif
+
 Name:           gambit-c
 Version:        4.7.3
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Scheme programming system
 
 Group:          Development/Languages
@@ -188,6 +193,9 @@ fi
 
 
 %changelog
+* Tue Nov 04 2014 Jakub Čajka <jcajka@redhat.com> - 4.7.3-2
+- Fix build OOM on s390
+
 * Thu Oct 30 2014 Michel Alexandre Salim <salimma@fedoraproject.org> - 4.7.3-1
 - Update to 4.7.3