diff --git a/java-1_8_0-openjdk.spec b/java-1_8_0-openjdk.spec
index f76624f..0f5c7e8 100644
--- a/java-1_8_0-openjdk.spec
+++ b/java-1_8_0-openjdk.spec
@@ -494,6 +494,9 @@ sh autogen.sh
         --with-abs-install-dir=%{_jvmdir}/%{sdkdir} \
 %ifnarch %{arm} %{aarch64}
         --with-parallel-jobs="${NUM_PROC}" \
+%endif
+%ifarch s390
+        --with-boot-jdk-jvmargs="-Xms256M -Xmx768M" \
 %endif
         --with-pkgversion="suse-%{release}-%{_arch}" \
         --with-jdk-home="%{_sysconfdir}/alternatives/java_sdk" \