diff --git a/dlls/urlmon/session.c b/dlls/urlmon/session.c
index 3a843cd6593..0596c1df75f 100644
--- a/dlls/urlmon/session.c
+++ b/dlls/urlmon/session.c
@@ -514,8 +514,8 @@ static size_t obtain_user_agent(unsigned int version, WCHAR *ret, size_t size)
     size_t len = 0;
     HKEY key;
 
-    if(version & 0x1000) {
-        version &= ~0x1000;
+    if(version & UAS_EXACTLEGACY) {
+        version &= ~UAS_EXACTLEGACY;
         if(version == 7)
             quirks = TRUE;
         else
diff --git a/dlls/urlmon/tests/misc.c b/dlls/urlmon/tests/misc.c
index d64dcc5965d..2b3df65d5fc 100644
--- a/dlls/urlmon/tests/misc.c
+++ b/dlls/urlmon/tests/misc.c
@@ -1515,7 +1515,7 @@ static void test_user_agent(void)
 
         if (i != 7) {
             size = sizeof(ua);
-            hres = pObtainUserAgentString(i | 0x1000, ua, &size);
+            hres = pObtainUserAgentString(i | UAS_EXACTLEGACY, ua, &size);
             ok(hres == S_OK, "ObtainUserAgentString failed: %08x\n", hres);
             ok(size == strlen(ua) + 1, "unexpected size %u, expected %u\n", size, strlen(ua) + 1);
             ok(!strcmp(ua, str2), "unexpected UA for version %u %s, expected %s\n",
@@ -1523,7 +1523,7 @@ static void test_user_agent(void)
         }
 
         size = sizeof(ua);
-        hres = pObtainUserAgentString(i != 1 ? i : 0x1007, ua, &size);
+        hres = pObtainUserAgentString(i != 1 ? i : UAS_EXACTLEGACY | 7, ua, &size);
         ok(hres == S_OK, "ObtainUserAgentString failed: %08x\n", hres);
         ok(size == strlen(ua) + 1, "unexpected size %u, expected %u\n", size, strlen(ua) + 1);
         if(i < 8 && i != 1)
diff --git a/include/urlmon.idl b/include/urlmon.idl
index fd8d6ce7bc8..867d3ebc959 100644
--- a/include/urlmon.idl
+++ b/include/urlmon.idl
@@ -2113,6 +2113,8 @@ struct CONFIRMSAFETY
     DWORD dwFlags;
 };
 
+cpp_quote("#define UAS_EXACTLEGACY 0x1000")
+
 cpp_quote("EXTERN_C const GUID GUID_CUSTOM_CONFIRMOBJECTSAFETY;")
 
 cpp_quote("DEFINE_GUID(CLSID_InternetSecurityManager, 0x7b8a2d94, 0x0ac9, 0x11d1, 0x89, 0x6c, 0x00, 0xc0, 0x4f, 0xB6, 0xbf, 0xc4);")