diff --git a/README.md b/README.md
index 8f722634be..dfa7b580b2 100644
--- a/README.md
+++ b/README.md
@@ -503,7 +503,7 @@ compress the jar before generating the object:
            boot.jar.lzma boot-jar.o _binary_boot_jar_start _binary_boot_jar_end \
            ${platform} ${arch}
 
-Note that you'll need to specify "-Xbootclasspath:[lzma:bootJar]"
+Note that you'll need to specify "-Xbootclasspath:[lzma.bootJar]"
 instead of "-Xbootclasspath:[bootJar]" in the next step if you've used
 LZMA to compress the jar.
 
diff --git a/openjdk.pro b/openjdk.pro
index 4ad548281d..d3560dc7bb 100644
--- a/openjdk.pro
+++ b/openjdk.pro
@@ -9,6 +9,10 @@
    public void run();
  }
 
+-keepclassmembers class java.lang.ThreadGroup {
+   void threadTerminated(java.lang.Thread);
+ }
+
 -keep class java.lang.System {
    private static void initializeSystemClass();
    public static void setProperties(java.util.Properties);
diff --git a/src/finder.cpp b/src/finder.cpp
index 32ce777b7b..eb64d92c08 100644
--- a/src/finder.cpp
+++ b/src/finder.cpp
@@ -566,7 +566,7 @@ class BuiltinElement: public JarElement {
   virtual void init() {
     if (index == 0) {
       if (s->success(s->load(&library, libraryName))) {
-        bool lzma = strncmp("lzma:", name, 5) == 0;
+        bool lzma = strncmp("lzma.", name, 5) == 0;
         const char* symbolName = lzma ? name + 5 : name;
 
         void* p = library->resolve(symbolName);