diff --git a/src/httpsys.cc b/src/httpsys.cc
index 7c6a4fd..59c73ba 100644
--- a/src/httpsys.cc
+++ b/src/httpsys.cc
@@ -122,6 +122,13 @@ char* verbs[] = {
     "SEARCH"
 };
 
+const int LAST_ERROR_BUF_SIZE = 1024;
+char lastCheckErrorBuf[LAST_ERROR_BUF_SIZE];
+void SetLastFromCheckError(long err, const char *file, int line)
+{
+    sprintf_s(lastCheckErrorBuf,LAST_ERROR_BUF_SIZE,"%s.%d Error Code: %i",file,line,err);
+}
+
 // Processing common to all callbacks from HTTP.SYS:
 // - map the uv_async_t handle to uv_httpsys_t
 // - decrement event loop reference count to indicate completion of async operation
@@ -824,7 +831,7 @@ Handle<Value> httpsys_listen(const Arguments& args)
         uv_httpsys = NULL;
     }
 
-    return handleScope.Close(ThrowException(Int32::New(hr)));
+    return handleScope.Close(ThrowException(String::New(lastCheckErrorBuf)));
 }
 
 Handle<Value> httpsys_stop_listen(const Arguments& args)
diff --git a/src/httpsys.h b/src/httpsys.h
index 1981f6f..43acc4e 100644
--- a/src/httpsys.h
+++ b/src/httpsys.h
@@ -27,6 +27,7 @@ using namespace v8;
         if (S_OK != tmp_hr)       \
         {                         \
             hr = tmp_hr;          \
+            SetLastFromCheckError(hr, __FILE__, __LINE__); \
             goto Error;           \
         }                         \
     }