diff --git a/common/JackShmMem.cpp b/common/JackShmMem.cpp
index 26ef492b..e5803fda 100644
--- a/common/JackShmMem.cpp
+++ b/common/JackShmMem.cpp
@@ -111,7 +111,7 @@ void LockMemoryImp(void* ptr, size_t size)
     if (CHECK_MLOCK((char*)ptr, size)) {
         jack_log("Succeeded in locking %u byte memory area", size);
     } else {
-        jack_error("Cannot lock down memory area (%s)", strerror(errno));
+        jack_error("Cannot lock down %u byte memory area (%s)", size, strerror(errno));
     }
 }
 
diff --git a/common/JackShmMem.h b/common/JackShmMem.h
index 13d1c43a..397434fc 100644
--- a/common/JackShmMem.h
+++ b/common/JackShmMem.h
@@ -245,13 +245,13 @@ class JackShmReadWritePtr1
                 if (jack_attach_lib_shm(&fInfo)) {
                     throw std::bad_alloc();
                 }
+                GetShmAddress()->LockMemory();
                 /*
                 nobody else needs to access this shared memory any more, so
                 destroy it. because we have our own attachment to it, it won't
                 vanish till we exit (and release it).
                 */
                 jack_destroy_shm(&fInfo);
-                GetShmAddress()->LockMemory();
             }
         }