diff --git a/smali/src/main/java/org/jf/smali/main.java b/smali/src/main/java/org/jf/smali/main.java
index 98c5d66..86c2229 100644
--- a/smali/src/main/java/org/jf/smali/main.java
+++ b/smali/src/main/java/org/jf/smali/main.java
@@ -380,7 +380,9 @@
                 .create("o");
 
         Option allowOdexOption = OptionBuilder.withLongOpt("allow-odex-instructions")
-                .withDescription("allow odex instructions to be compiled into the dex file")
+                .withDescription("allow odex instructions to be compiled into the dex file. Only a few" +
+                        " instructions are supported - the ones that can exist in a dead code path and not" +
+                        " cause dalvik to reject the class")
                 .create("x");
 
         Option dumpOption = OptionBuilder.withLongOpt("dump-to")