diff --git a/smali/src/main/antlr3/smaliTreeWalker.g b/smali/src/main/antlr3/smaliTreeWalker.g
index 326d5bd1..66110645 100644
--- a/smali/src/main/antlr3/smaliTreeWalker.g
+++ b/smali/src/main/antlr3/smaliTreeWalker.g
@@ -52,6 +52,11 @@ import org.jf.dexlib.Code.Format.*;
 @members {
   public DexFile dexFile;
   public TypeIdItem classType;
+  private boolean verboseErrors = false;
+
+  public void setVerboseErrors(boolean verboseErrors) {
+    this.verboseErrors = verboseErrors;
+  }
 
   private byte parseRegister_nibble(String register, int totalMethodRegisters, int methodParameterRegisters)
     throws SemanticException {
@@ -141,11 +146,13 @@ smali_file
         classDataItem, $fields.staticFieldInitialValues);
   };
   catch [Exception ex] {
+    if (verboseErrors) {
+      ex.printStackTrace(System.err);
+    }
     reportError(new SemanticException(input, ex));
   }
 
 
-
 header returns[TypeIdItem classType, int accessFlags, TypeIdItem superType, TypeListItem implementsList, StringIdItem sourceSpec]
 : class_spec super_spec? implements_list source_spec
   {
diff --git a/smali/src/main/java/org/jf/smali/main.java b/smali/src/main/java/org/jf/smali/main.java
index 773c08a4..ecd9cf99 100644
--- a/smali/src/main/java/org/jf/smali/main.java
+++ b/smali/src/main/java/org/jf/smali/main.java
@@ -318,7 +318,7 @@ public class main {
         treeStream.setTokenStream(tokens);
 
         smaliTreeWalker dexGen = new smaliTreeWalker(treeStream);
-
+        dexGen.setVerboseErrors(verboseErrors);
         dexGen.dexFile = dexFile;
         dexGen.smali_file();