diff --git a/lld/COFF/Driver.cpp b/lld/COFF/Driver.cpp
index 835c4b396ef2fd6c1bc1d21dd3278d7258977644..016efc8a02eab2dcc1c2d03a8fa33e2a1239c356 100644
--- a/lld/COFF/Driver.cpp
+++ b/lld/COFF/Driver.cpp
@@ -1167,6 +1167,8 @@ void LinkerDriver::link(ArrayRef<const char *> ArgsArr) {
   Symtab->addAbsolute(mangle("__guard_iat_table"), 0);
   Symtab->addAbsolute(mangle("__guard_longjmp_count"), 0);
   Symtab->addAbsolute(mangle("__guard_longjmp_table"), 0);
+  // Needed for MSVC 2017 15.5 CRT.
+  Symtab->addAbsolute(mangle("__enclave_config"), 0);
 
   // This code may add new undefined symbols to the link, which may enqueue more
   // symbol resolution tasks, so we need to continue executing tasks until we
diff --git a/lld/test/COFF/guardcf.test b/lld/test/COFF/guardcf.test
index 4f99d705301cc06eace07b1800d961ac49aae988..57dca5870d0fa70d524d8dc3b1de40422c132ec7 100644
--- a/lld/test/COFF/guardcf.test
+++ b/lld/test/COFF/guardcf.test
@@ -71,4 +71,10 @@ symbols:
     SimpleType:      IMAGE_SYM_TYPE_NULL
     ComplexType:     IMAGE_SYM_DTYPE_NULL
     StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+  - Name:            __enclave_config
+    Value:           0
+    SectionNumber:   0
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
 ...