diff --git a/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java b/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java
index 810582921..1dc862ec0 100644
--- a/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java
+++ b/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java
@@ -457,7 +457,7 @@ public abstract class IRTests {
       if (libFile.exists()) {
         foundLib = true;
         try {
-          engine.addSystemModule(new JarFileModule(new JarFile(libFile)));
+          engine.addSystemModule(new JarFileModule(new JarFile(libFile, false)));
         } catch (IOException e) {
           Assert.fail(e.getMessage());
         }
diff --git a/com.ibm.wala.core.tests/src/com/ibm/wala/core/tests/callGraph/Java7CallGraphTest.java b/com.ibm.wala.core.tests/src/com/ibm/wala/core/tests/callGraph/Java7CallGraphTest.java
index 63c742a5f..fa4d01be3 100644
--- a/com.ibm.wala.core.tests/src/com/ibm/wala/core/tests/callGraph/Java7CallGraphTest.java
+++ b/com.ibm.wala.core.tests/src/com/ibm/wala/core/tests/callGraph/Java7CallGraphTest.java
@@ -49,7 +49,7 @@ public class Java7CallGraphTest extends DynamicCallGraphTestBase {
     F.deleteOnExit();
 
     AnalysisScope scope = CallGraphTestUtil.makeJ2SEAnalysisScope("base.txt", CallGraphTestUtil.REGRESSION_EXCLUSIONS);
-    scope.addToScope(ClassLoaderReference.Application, new JarFile(F));
+    scope.addToScope(ClassLoaderReference.Application, new JarFile(F, false));
     
     ClassHierarchy cha = ClassHierarchy.make(scope);
     Iterable<Entrypoint> entrypoints = com.ibm.wala.ipa.callgraph.impl.Util.makeMainEntrypoints(scope, cha, "Lpack/ocamljavaMain");
diff --git a/com.ibm.wala.core.tests/src/com/ibm/wala/examples/analysis/SimpleThreadEscapeAnalysis.java b/com.ibm.wala.core.tests/src/com/ibm/wala/examples/analysis/SimpleThreadEscapeAnalysis.java
index eeb0c07f9..546747a96 100644
--- a/com.ibm.wala.core.tests/src/com/ibm/wala/examples/analysis/SimpleThreadEscapeAnalysis.java
+++ b/com.ibm.wala.core.tests/src/com/ibm/wala/examples/analysis/SimpleThreadEscapeAnalysis.java
@@ -104,7 +104,7 @@ public class SimpleThreadEscapeAnalysis extends AbstractAnalysisEngine {
         collectJars(files[i], result);
       }
     } else if (f.getAbsolutePath().endsWith(".jar")) {
-      result.add(new JarFile(f));
+      result.add(new JarFile(f, false));
     }
   }
 
@@ -330,7 +330,7 @@ public class SimpleThreadEscapeAnalysis extends AbstractAnalysisEngine {
 
     Set<JarFile> jars = HashSetFactory.make();
     for (int i = 1; i < args.length; i++) {
-      jars.add(new JarFile(args[i]));
+      jars.add(new JarFile(args[i], false));
     }
 
     Set<IClass> escapingTypes = (new SimpleThreadEscapeAnalysis(jars, mainClassName)).gatherThreadEscapingClasses();
diff --git a/com.ibm.wala.core/src/com/ibm/wala/classLoader/AbstractNestedJarFileModule.java b/com.ibm.wala.core/src/com/ibm/wala/classLoader/AbstractNestedJarFileModule.java
index f3e0c9f5e..8deba7cdc 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/classLoader/AbstractNestedJarFileModule.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/classLoader/AbstractNestedJarFileModule.java
@@ -58,7 +58,7 @@ public abstract class AbstractNestedJarFileModule implements Module {
     }
     cache = HashMapFactory.make();
      try {
-      final JarInputStream stream = new JarInputStream(getNestedContents());
+      final JarInputStream stream = new JarInputStream(getNestedContents(), false);
       for (ZipEntry z = stream.getNextEntry(); z != null; z = stream.getNextEntry()) {
         final String name = z.getName();
         if (DEBUG) {
diff --git a/com.ibm.wala.core/src/com/ibm/wala/classLoader/ClassLoaderImpl.java b/com.ibm.wala.core/src/com/ibm/wala/classLoader/ClassLoaderImpl.java
index 843fc0247..f177fba1f 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/classLoader/ClassLoaderImpl.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/classLoader/ClassLoaderImpl.java
@@ -321,7 +321,7 @@ public class ClassLoaderImpl implements IClassLoader {
     }
     Map<String, Object> result = HashMapFactory.make();
     try {
-      JarInputStream s = new JarInputStream(new ByteArrayInputStream(jarFileContents));
+      JarInputStream s = new JarInputStream(new ByteArrayInputStream(jarFileContents), false);
       JarEntry entry = null;
       while ((entry = s.getNextJarEntry()) != null) {
         byte[] entryBytes = getEntryBytes(entry, entrySizesForFile.get(entry.getName()), s);
diff --git a/com.ibm.wala.core/src/com/ibm/wala/util/config/AnalysisScopeReader.java b/com.ibm.wala.core/src/com/ibm/wala/util/config/AnalysisScopeReader.java
index fec54a6c5..70eb7bbc2 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/util/config/AnalysisScopeReader.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/util/config/AnalysisScopeReader.java
@@ -177,7 +177,7 @@ public class AnalysisScopeReader {
     } else if ("stdlib".equals(entryType)) {
       String[] stdlibs = WalaProperties.getJ2SEJarFiles();
       for (int i = 0; i < stdlibs.length; i++) {
-        scope.addToScope(walaLoader, new JarFile(stdlibs[i]));
+        scope.addToScope(walaLoader, new JarFile(stdlibs[i], false));
       }
     } else {
       Assertions.UNREACHABLE();
@@ -222,7 +222,7 @@ public class AnalysisScopeReader {
       while (paths.hasMoreTokens()) {
         String path = paths.nextToken();
         if (path.endsWith(".jar")) {
-          JarFile jar = new JarFile(path);
+          JarFile jar = new JarFile(path, false);
           scope.addToScope(loader, jar);
           try {
             if (jar.getManifest() != null) {
diff --git a/com.ibm.wala.core/src/com/ibm/wala/util/io/FileProvider.java b/com.ibm.wala.core/src/com/ibm/wala/util/io/FileProvider.java
index eff3b20a4..342410878 100644
--- a/com.ibm.wala.core/src/com/ibm/wala/util/io/FileProvider.java
+++ b/com.ibm.wala.core/src/com/ibm/wala/util/io/FileProvider.java
@@ -175,7 +175,7 @@ public class FileProvider {
       return new JarFileModule(new JarFile(filePath, false));
     } else {
       final URLConnection in = url.openConnection();
-      final JarInputStream jarIn = new JarInputStream(in.getInputStream());
+      final JarInputStream jarIn = new JarInputStream(in.getInputStream(), false);
       return new JarStreamModule(jarIn);
     }
   }
diff --git a/com.ibm.wala.shrike/src/com/ibm/wala/shrikeBT/tools/OfflineInstrumenterBase.java b/com.ibm.wala.shrike/src/com/ibm/wala/shrikeBT/tools/OfflineInstrumenterBase.java
index 3421d43a7..693eafdfd 100644
--- a/com.ibm.wala.shrike/src/com/ibm/wala/shrikeBT/tools/OfflineInstrumenterBase.java
+++ b/com.ibm.wala.shrike/src/com/ibm/wala/shrikeBT/tools/OfflineInstrumenterBase.java
@@ -170,7 +170,7 @@ public abstract class OfflineInstrumenterBase {
         cachedJar.close();
       }
       cachedJarFile = file;
-      cachedJar = new JarFile(file);
+      cachedJar = new JarFile(file, false);
       return cachedJar;
     }
   }
@@ -230,7 +230,7 @@ public abstract class OfflineInstrumenterBase {
    * Add a JAR file containing source classes to instrument.
    */
   final public void addInputJar(File f) throws IOException {
-    JarFile jf = new JarFile(f);
+    JarFile jf = new JarFile(f, false);
     for (Enumeration<JarEntry> e = jf.entries(); e.hasMoreElements();) {
       JarEntry entry = e.nextElement();
       String name = entry.getName();