diff --git a/src/brut/androlib/Androlib.java b/src/brut/androlib/Androlib.java
index 2e1cc4d2..4c35170f 100644
--- a/src/brut/androlib/Androlib.java
+++ b/src/brut/androlib/Androlib.java
@@ -196,6 +196,9 @@ public class Androlib {
     public boolean buildResourcesFull(File appDir, boolean forceBuildAll,
             boolean framework) throws AndrolibException {
         try {
+            if (! new File(appDir, "res").exists()) {
+                return false;
+            }
             if (! forceBuildAll) {
                 LOGGER.info("Checking whether resources has changed...");
             }
diff --git a/src/brut/androlib/res/AndrolibResources.java b/src/brut/androlib/res/AndrolibResources.java
index d7114d4e..9583a2df 100644
--- a/src/brut/androlib/res/AndrolibResources.java
+++ b/src/brut/androlib/res/AndrolibResources.java
@@ -132,6 +132,11 @@ final public class AndrolibResources {
 
     public boolean detectWhetherAppIsFramework(File appDir)
             throws AndrolibException {
+        File publicXml = new File(appDir, "res/values/public.xml");
+        if (! publicXml.exists()) {
+            return false;
+        }
+
         Iterator<String> it;
         try {
             it = IOUtils.lineIterator(