diff --git a/hotspot/src/share/vm/compiler/disassembler.hpp b/hotspot/src/share/vm/compiler/disassembler.hpp
index fb718b2b026..eca47a798f8 100644
--- a/hotspot/src/share/vm/compiler/disassembler.hpp
+++ b/hotspot/src/share/vm/compiler/disassembler.hpp
@@ -85,6 +85,7 @@ class Disassembler {
 
  public:
   static bool can_decode() {
+    ttyLocker tl;
     return (_decode_instructions_virtual != NULL) ||
            (_decode_instructions != NULL) ||
            load_library();