diff --git a/dlls/kernel32/tests/actctx.c b/dlls/kernel32/tests/actctx.c
index cef11a5e631..263fe3997cb 100644
--- a/dlls/kernel32/tests/actctx.c
+++ b/dlls/kernel32/tests/actctx.c
@@ -426,9 +426,9 @@ static const char compat_manifest_vista_7_8_10_81[] =
 "   <assemblyIdentity version=\"1.0.0.0\"  name=\"Wine.Test\" type=\"win32\"></assemblyIdentity>"
 "   <compatibility xmlns=\"urn:schemas-microsoft-com:compatibility.v1\">"
 "       <application>"
-"           <supportedOS Id=\"{e2011457-1546-43c5-a5fe-008deee3d3f0}\" />"  /* Windows Vista */
+"           <supportedOS Id=\"{e2011457-1546-43c5-a5fe-008deee3d3f0}\" ></supportedOS>"  /* Windows Vista */
 "           <supportedOS Id=\"{35138b9a-5d96-4fbd-8e2d-a2440225f93a}\" />"  /* Windows 7 */
-"           <supportedOS Id=\"{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}\" />"  /* Windows 8 */
+"           <supportedOS Id=\"{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}\" ></supportedOS>"  /* Windows 8 */
 "           <supportedOS Id=\"{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}\" />"  /* Windows 10 */
 "           <supportedOS Id=\"{1f676c76-80e1-4239-95bb-83d0f6d0da78}\" />"  /* Windows 8.1 */
 "       </application>"
diff --git a/dlls/ntdll/actctx.c b/dlls/ntdll/actctx.c
index 4a3370048fa..27d6ad864c0 100644
--- a/dlls/ntdll/actctx.c
+++ b/dlls/ntdll/actctx.c
@@ -2245,11 +2245,50 @@ static BOOL parse_file_elem(xmlbuf_t* xmlbuf, struct assembly* assembly, struct
     return ret;
 }
 
+static BOOL parse_supportedos_elem(xmlbuf_t *xmlbuf, struct assembly *assembly, struct actctx_loader *acl)
+{
+    xmlstr_t attr_name, attr_value;
+    BOOL end = FALSE, error;
+
+    while (next_xml_attr(xmlbuf, &attr_name, &attr_value, &error, &end))
+    {
+        if (xmlstr_cmp(&attr_name, IdW))
+        {
+            COMPATIBILITY_CONTEXT_ELEMENT *compat;
+            UNICODE_STRING str;
+            GUID compat_id;
+
+            str.Buffer = (PWSTR)attr_value.ptr;
+            str.Length = str.MaximumLength = (USHORT)attr_value.len * sizeof(WCHAR);
+            if (RtlGUIDFromString(&str, &compat_id) == STATUS_SUCCESS)
+            {
+                if (!(compat = add_compat_context(assembly))) return FALSE;
+                compat->Type = ACTCX_COMPATIBILITY_ELEMENT_TYPE_OS;
+                compat->Id = compat_id;
+            }
+            else
+            {
+                WARN("Invalid guid %s\n", debugstr_xmlstr(&attr_value));
+            }
+        }
+        else
+        {
+            WARN("unknown attr %s=%s\n", debugstr_xmlstr(&attr_name),
+                 debugstr_xmlstr(&attr_value));
+        }
+    }
+
+    if (error) return FALSE;
+    if (end) return TRUE;
+
+    return parse_expect_end_elem(xmlbuf, supportedOSW, asmv1W);
+}
+
 static BOOL parse_compatibility_application_elem(xmlbuf_t* xmlbuf, struct assembly* assembly,
                                                  struct actctx_loader* acl)
 {
-    xmlstr_t attr_name, attr_value, elem;
-    BOOL end = FALSE, ret = TRUE, error;
+    BOOL ret = TRUE;
+    xmlstr_t elem;
 
     while (ret && (ret = next_xml_elem(xmlbuf, &elem)))
     {
@@ -2260,32 +2299,7 @@ static BOOL parse_compatibility_application_elem(xmlbuf_t* xmlbuf, struct assemb
         }
         else if (xmlstr_cmp(&elem, supportedOSW))
         {
-            while (next_xml_attr(xmlbuf, &attr_name, &attr_value, &error, &end))
-            {
-                if (xmlstr_cmp(&attr_name, IdW))
-                {
-                    UNICODE_STRING str;
-                    COMPATIBILITY_CONTEXT_ELEMENT* compat;
-                    GUID compat_id;
-                    str.Buffer = (PWSTR)attr_value.ptr;
-                    str.Length = str.MaximumLength = (USHORT)attr_value.len * sizeof(WCHAR);
-                    if (RtlGUIDFromString(&str, &compat_id) == STATUS_SUCCESS)
-                    {
-                        if (!(compat = add_compat_context(assembly))) return FALSE;
-                        compat->Type = ACTCX_COMPATIBILITY_ELEMENT_TYPE_OS;
-                        compat->Id = compat_id;
-                    }
-                    else
-                    {
-                        WARN("Invalid guid %s\n", debugstr_xmlstr(&attr_value));
-                    }
-                }
-                else
-                {
-                    WARN("unknown attr %s=%s\n", debugstr_xmlstr(&attr_name),
-                         debugstr_xmlstr(&attr_value));
-                }
-            }
+            ret = parse_supportedos_elem(xmlbuf, assembly, acl);
         }
         else
         {