diff --git a/dlls/urlmon/sec_mgr.c b/dlls/urlmon/sec_mgr.c
index 11f8c2a68e5..314605eba6c 100644
--- a/dlls/urlmon/sec_mgr.c
+++ b/dlls/urlmon/sec_mgr.c
@@ -444,50 +444,38 @@ static HRESULT search_for_domain_mapping(HKEY domains, LPCWSTR schema, LPCWSTR h
     return hres;
 }
 
-static HRESULT get_zone_from_domains(LPCWSTR url, LPCWSTR schema, DWORD *zone)
+static HRESULT get_zone_from_domains(IUri *uri, DWORD *zone)
 {
     HRESULT hres;
-    WCHAR *host_name;
-    DWORD host_len = lstrlenW(url)+1;
+    BSTR host, scheme;
     DWORD res;
     HKEY domains;
+    DWORD scheme_type;
 
-    host_name = heap_alloc(host_len*sizeof(WCHAR));
-    if(!host_name)
-        return E_OUTOFMEMORY;
-
-    hres = CoInternetParseUrl(url, PARSE_DOMAIN, 0, host_name, host_len, &host_len, 0);
-    if(hres == S_FALSE) {
-        WCHAR *tmp = heap_realloc(host_name, (host_len+1)*sizeof(WCHAR));
-        if(!tmp) {
-            heap_free(host_name);
-            return E_OUTOFMEMORY;
-        }
-
-        host_name = tmp;
-        hres = CoInternetParseUrl(url, PARSE_DOMAIN, 0, host_name, host_len+1, &host_len, 0);
-    }
+    hres = IUri_GetScheme(uri, &scheme_type);
+    if(FAILED(hres))
+        return hres;
 
     /* Windows doesn't play nice with unknown scheme types when it tries
      * to check if a host name maps into any domains.
-     *
-     * The reason is with how CoInternetParseUrl handles unknown scheme types
-     * when it's parsing the domain of a URL (IE it always returns E_FAIL).
-     *
-     * Windows doesn't compensate for this and simply doesn't check if
-     * the URL maps into any domains.
      */
-    if(hres != S_OK) {
-        heap_free(host_name);
-        if(hres == E_FAIL)
-            return S_FALSE;
+    if(scheme_type == URL_SCHEME_UNKNOWN)
+        return S_FALSE;
+
+    hres = IUri_GetHost(uri, &host);
+    if(FAILED(hres))
+        return hres;
+
+    hres = IUri_GetSchemeName(uri, &scheme);
+    if(FAILED(hres)) {
+        SysFreeString(host);
         return hres;
     }
 
     /* First try CURRENT_USER. */
     res = RegOpenKeyW(HKEY_CURRENT_USER, wszZoneMapDomainsKey, &domains);
     if(res == ERROR_SUCCESS) {
-        hres = search_for_domain_mapping(domains, schema, host_name, host_len, zone);
+        hres = search_for_domain_mapping(domains, scheme, host, SysStringLen(host), zone);
         RegCloseKey(domains);
     } else
         WARN("Failed to open HKCU's %s key\n", debugstr_w(wszZoneMapDomainsKey));
@@ -496,13 +484,14 @@ static HRESULT get_zone_from_domains(LPCWSTR url, LPCWSTR schema, DWORD *zone)
     if(hres == S_FALSE) {
         res = RegOpenKeyW(HKEY_LOCAL_MACHINE, wszZoneMapDomainsKey, &domains);
         if(res == ERROR_SUCCESS) {
-            hres = search_for_domain_mapping(domains, schema, host_name, host_len, zone);
+            hres = search_for_domain_mapping(domains, scheme, host, SysStringLen(host), zone);
             RegCloseKey(domains);
         } else
             WARN("Failed to open HKLM's %s key\n", debugstr_w(wszZoneMapDomainsKey));
     }
 
-    heap_free(host_name);
+    SysFreeString(host);
+    SysFreeString(scheme);
     return hres;
 }
 
@@ -563,16 +552,7 @@ static HRESULT map_security_uri_to_zone(IUri *uri, DWORD *zone)
     }
 
     if(*zone == URLZONE_INVALID) {
-        BSTR secur_url;
-
-        hres = IUri_GetDisplayUri(uri, &secur_url);
-        if(FAILED(hres)) {
-            SysFreeString(scheme);
-            return hres;
-        }
-
-        hres = get_zone_from_domains(secur_url, scheme, zone);
-        SysFreeString(secur_url);
+        hres = get_zone_from_domains(uri, zone);
         if(hres == S_FALSE)
             hres = get_zone_from_reg(scheme, zone);
     }
diff --git a/dlls/urlmon/tests/sec_mgr.c b/dlls/urlmon/tests/sec_mgr.c
index 3e8cef3c246..c8d5b8b8083 100644
--- a/dlls/urlmon/tests/sec_mgr.c
+++ b/dlls/urlmon/tests/sec_mgr.c
@@ -604,7 +604,8 @@ static const zone_domain_mapping zone_domain_mappings[] = {
     {"www.testing.com",NULL,"http",URLZONE_CUSTOM},
     {"www.testing.com","testing","http",URLZONE_CUSTOM2},
     {"org",NULL,"http",URLZONE_CUSTOM},
-    {"org","testing","http",URLZONE_CUSTOM2}
+    {"org","testing","http",URLZONE_CUSTOM2},
+    {"wine.testing",NULL,"*",URLZONE_CUSTOM2}
 };
 
 static void register_zone_domains(void)
@@ -751,7 +752,10 @@ static const zone_mapping_test zone_mapping_tests[] = {
     /* Tests for "org" zone mappings. */
     {"http://google.org/",URLZONE_INTERNET,FALSE,URLZONE_CUSTOM},
     {"http://org/",URLZONE_CUSTOM},
-    {"http://testing.org/",URLZONE_CUSTOM2}
+    {"http://testing.org/",URLZONE_CUSTOM2},
+    /* Tests for "wine.testing" mapping */
+    {"*:wine.testing/test",URLZONE_CUSTOM2},
+    {"http://wine.testing/testing",URLZONE_CUSTOM2}
 };
 
 static void test_zone_domain_mappings(void)