Index: trunk/build.xml
===================================================================
--- trunk/build.xml	(revision 12889)
+++ trunk/build.xml	(revision 12890)
@@ -455,5 +455,5 @@
                     <jvmarg value="-Dfile.encoding=UTF-8"/>
                     <jvmarg value="--add-modules" if:set="isJava9" />
-                    <jvmarg value="java.se.ee" if:set="isJava9" />
+                    <jvmarg value="java.activation,java.se.ee" if:set="isJava9" />
                     <jvmarg value="--add-exports" if:set="isJava9" />
                     <jvmarg value="java.base/sun.security.util=ALL-UNNAMED" if:set="isJava9" />
Index: trunk/josm-latest.jnlp
===================================================================
--- trunk/josm-latest.jnlp	(revision 12889)
+++ trunk/josm-latest.jnlp	(revision 12890)
@@ -20,5 +20,5 @@
     </security>
     <resources>
-        <java version="1.8+"/>
+        <java version="1.8+" java-vm-args="--add-modules=java.activation,java.se.ee --add-exports=java.base/sun.security.util=ALL-UNNAMED --add-exports=java.base/sun.security.x509=ALL-UNNAMED --add-exports=java.desktop/com.apple.eawt=ALL-UNNAMED --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED --add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED --add-exports=jdk.deploy/com.sun.deploy.config=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED"/>
         <jar href="josm-latest.jar"/>
         <property name="java.util.Arrays.useLegacyMergeSort" value="true"/>
Index: trunk/josm.jnlp
===================================================================
--- trunk/josm.jnlp	(revision 12889)
+++ trunk/josm.jnlp	(revision 12890)
@@ -20,5 +20,5 @@
     </security>
     <resources>
-        <java version="1.8+"/>
+        <java version="1.8+" java-vm-args="--add-modules=java.activation,java.se.ee --add-exports=java.base/sun.security.util=ALL-UNNAMED --add-exports=java.base/sun.security.x509=ALL-UNNAMED --add-exports=java.desktop/com.apple.eawt=ALL-UNNAMED --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED --add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED --add-exports=jdk.deploy/com.sun.deploy.config=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED"/>
         <jar href="josm-tested.jar"/>
         <property name="java.util.Arrays.useLegacyMergeSort" value="true"/>
Index: trunk/linux/latest/usr/bin/josm-latest
===================================================================
--- trunk/linux/latest/usr/bin/josm-latest	(revision 12889)
+++ trunk/linux/latest/usr/bin/josm-latest	(revision 12890)
@@ -48,5 +48,5 @@
     echo "Using $JAVACMD to execute josm-latest." || true
     if [ "`expr match \"${JAVACMD}\" 'java-9'`" != "0" ]; then
-        JAVA_OPTS="--add-modules java.se.ee $JAVA_OPTS"
+        JAVA_OPTS="--add-modules java.activation,java.se.ee $JAVA_OPTS"
     fi
     set +e
Index: trunk/linux/tested/usr/bin/josm
===================================================================
--- trunk/linux/tested/usr/bin/josm	(revision 12889)
+++ trunk/linux/tested/usr/bin/josm	(revision 12890)
@@ -48,5 +48,5 @@
     echo "Using $JAVACMD to execute josm." || true
     if [ "`expr match \"${JAVACMD}\" 'java-9'`" != "0" ]; then
-        JAVA_OPTS="--add-modules java.se.ee $JAVA_OPTS"
+        JAVA_OPTS="--add-modules java.activation,java.se.ee $JAVA_OPTS"
     fi
     set +e