diff --git a/tools/gccas/gccas.cpp b/tools/gccas/gccas.cpp
index fe9c9d4110a..3fa0cfa7dd4 100644
--- a/tools/gccas/gccas.cpp
+++ b/tools/gccas/gccas.cpp
@@ -49,6 +49,9 @@ namespace {
 
   cl::opt<bool>
   DisableDSE("disable-dse", cl::desc("Do not run dead store elimination"));
+  cl::opt<bool> 
+  NoCompress("disable-compression", cl::init(false),
+             cl::desc("Don't ompress the generated bytecode"));
 }
 
 
@@ -182,7 +185,7 @@ int main(int argc, char **argv) {
   Passes.add(createVerifierPass());
 
   // Write bytecode to file...
-  Passes.add(new WriteBytecodePass(Out));
+  Passes.add(new WriteBytecodePass(Out,false,!NoCompress));
 
   // Run our queue of passes all at once now, efficiently.
   Passes.run(*M.get());