diff --git a/windows/winmme/JackWinMMEDriver.cpp b/windows/winmme/JackWinMMEDriver.cpp
index fa3e1f7f..2a9085ec 100644
--- a/windows/winmme/JackWinMMEDriver.cpp
+++ b/windows/winmme/JackWinMMEDriver.cpp
@@ -186,7 +186,6 @@ JackWinMMEDriver::Open(bool capturing, bool playing, int in_channels,
     jack_info("JackWinMMEDriver::Open - input_count  %d", input_count);
     jack_info("JackWinMMEDriver::Open - output_count  %d", output_count);
 
-
     if (! (input_count || output_count)) {
         jack_error("JackWinMMEDriver::Open - no WinMME inputs or outputs "
                    "allocated.");
diff --git a/windows/winmme/JackWinMMEInputPort.cpp b/windows/winmme/JackWinMMEInputPort.cpp
index 6bb2d2a5..871934c4 100644
--- a/windows/winmme/JackWinMMEInputPort.cpp
+++ b/windows/winmme/JackWinMMEInputPort.cpp
@@ -111,7 +111,10 @@ JackWinMMEInputPort::JackWinMMEInputPort(const char *alias_name,
         WriteInError("JackWinMMEInputPort [constructor]", "midiInClose", result);
     }
  delete_sysex_buffer:
-    delete[] sysex_buffer;
+    delete[] sysex_buffer;
+    // auto_ptr causing crash so explicitly deleting here...
+    delete thread_queue;
+    delete write_queue;
     throw std::runtime_error(error_message);
 }
 
diff --git a/windows/winmme/JackWinMMEOutputPort.cpp b/windows/winmme/JackWinMMEOutputPort.cpp
index a3a478e1..05e97362 100644
--- a/windows/winmme/JackWinMMEOutputPort.cpp
+++ b/windows/winmme/JackWinMMEOutputPort.cpp
@@ -99,7 +99,11 @@ JackWinMMEOutputPort::JackWinMMEOutputPort(const char *alias_name,
         WriteOutError("JackWinMMEOutputPort [constructor]", "midiOutClose",
                      result);
     }
- raise_exception:
+ raise_exception:
+    // auto_ptr causing crash so explicitly deleting here...
+    delete read_queue;
+    delete thread_queue;
+    delete thread;
     throw std::runtime_error(error_message);
 }