--- a/mozglue/build/WindowsDllBlocklist.cpp
+++ b/mozglue/build/WindowsDllBlocklist.cpp
@@ -68,16 +68,17 @@ struct DllBlockInfo {
   //
   // If the CHILD_PROCESSES_ONLY flag is set, then the dll is blocked
   // only when we are a child process.
   unsigned long long maxVersion;
 
   enum {
     FLAGS_DEFAULT = 0,
     BLOCK_WIN8PLUS_ONLY = 1,
+    BLOCK_WIN8_ONLY = 2,
     USE_TIMESTAMP = 4,
     CHILD_PROCESSES_ONLY = 8
   } flags;
 };
 
 static const DllBlockInfo sWindowsDllBlocklist[] = {
   // EXAMPLE:
   // { "uxtheme.dll", ALL_VERSIONS },
@@ -695,16 +696,21 @@ patched_LdrLoadDll (PWCHAR filePath, PUL
     printf_stderr("LdrLoadDll: info->name: '%s'\n", info->name);
 #endif
 
     if ((info->flags & DllBlockInfo::BLOCK_WIN8PLUS_ONLY) &&
         !IsWin8OrLater()) {
       goto continue_loading;
     }
 
+    if ((info->flags & DllBlockInfo::BLOCK_WIN8_ONLY) &&
+        (!IsWin8OrLater() || IsWin8Point1OrLater())) {
+      goto continue_loading;
+    }
+
     if ((info->flags & DllBlockInfo::CHILD_PROCESSES_ONLY) &&
         !(sInitFlags & eDllBlocklistInitFlagIsChildProcess)) {
       goto continue_loading;
     }
 
     unsigned long long fVersion = ALL_VERSIONS;
 
     if (info->maxVersion != ALL_VERSIONS) {