diff --git a/bypy/windows/__main__.py b/bypy/windows/__main__.py
index 1d9b72fa7b..93814ed986 100644
--- a/bypy/windows/__main__.py
+++ b/bypy/windows/__main__.py
@@ -66,7 +66,7 @@ SUPPORTED_OS = {
 
 EXE_MANIFEST = '''\
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-  <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
     <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
         <security>
             <requestedPrivileges>
@@ -75,14 +75,17 @@ EXE_MANIFEST = '''\
         </security>
     </trustInfo>
     <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
-      <application>
-          <supportedOS Id="{w7}"/>
-          <supportedOS Id="{w8}"/>
-          <supportedOS Id="{w81}"/>
-          <supportedOS Id="{w10}"/>
-      </application>
+        <application xmlns="urn:schemas-microsoft-com:asm.v3">
+            <supportedOS Id="{w7}"/>
+            <supportedOS Id="{w8}"/>
+            <supportedOS Id="{w81}"/>
+            <supportedOS Id="{w10}"/>
+            <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
+                <ws2:longPathAware>true</ws2:longPathAware>
+            </windowsSettings>
+        </application>
     </compatibility>
-  </assembly>
+</assembly>
 '''.format(**SUPPORTED_OS)
 
 
diff --git a/src/calibre/utils/windows/winutil.cpp b/src/calibre/utils/windows/winutil.cpp
index 10152dcd4d..4c70a958e5 100644
--- a/src/calibre/utils/windows/winutil.cpp
+++ b/src/calibre/utils/windows/winutil.cpp
@@ -351,12 +351,9 @@ winutil_username(PyObject *self) {
 
 static PyObject *
 winutil_temp_path(PyObject *self) {
-    wchar_t buf[MAX_PATH + 1] = {0};
+    wchar_t buf[MAX_PATH + 8] = {0};
     DWORD sz = sizeof(buf)/sizeof(buf[0]);
-    if (!GetTempPath(sz, buf)) {
-        PyErr_SetFromWindowsErr(0);
-        return NULL;
-    }
+    if (!GetTempPathW(sz, buf)) return PyErr_SetFromWindowsErr(0);
     return PyUnicode_FromWideChar(buf, -1);
 }