diff --git a/java-1_8_0-openjdk.spec b/java-1_8_0-openjdk.spec
index 9d0bf48..dcc454c 100644
--- a/java-1_8_0-openjdk.spec
+++ b/java-1_8_0-openjdk.spec
@@ -498,6 +498,7 @@ sh autogen.sh
 %endif
 %ifarch s390
         --with-boot-jdk-jvmargs="-Xms256M -Xmx768M" \
+        --with-memory-size="1024" \
 %endif
         --with-pkgversion="suse-%{release}-%{_arch}" \
         --with-jdk-home="%{_sysconfdir}/alternatives/java_sdk" \