Index: cfe/trunk/lib/Driver/ToolChains/MinGW.cpp
===================================================================
--- cfe/trunk/lib/Driver/ToolChains/MinGW.cpp
+++ cfe/trunk/lib/Driver/ToolChains/MinGW.cpp
@@ -83,7 +83,7 @@
   CmdArgs.push_back("-lmoldname");
   CmdArgs.push_back("-lmingwex");
   for (auto Lib : Args.getAllArgValues(options::OPT_l))
-    if (StringRef(Lib).startswith("msvcr") || Lib == "ucrtbase")
+    if (StringRef(Lib).startswith("msvcr") || StringRef(Lib).startswith("ucrt"))
       return;
   CmdArgs.push_back("-lmsvcrt");
 }
Index: cfe/trunk/test/Driver/mingw-msvcrt.c
===================================================================
--- cfe/trunk/test/Driver/mingw-msvcrt.c
+++ cfe/trunk/test/Driver/mingw-msvcrt.c
@@ -1,6 +1,12 @@
 // RUN: %clang -v -target i686-pc-windows-gnu -### %s 2>&1 | FileCheck -check-prefix=CHECK_DEFAULT %s
 // RUN: %clang -v -target i686-pc-windows-gnu -lmsvcr120 -### %s 2>&1 | FileCheck -check-prefix=CHECK_MSVCR120 %s
+// RUN: %clang -v -target i686-pc-windows-gnu -lucrtbase -### %s 2>&1 | FileCheck -check-prefix=CHECK_UCRTBASE %s
+// RUN: %clang -v -target i686-pc-windows-gnu -lucrt -### %s 2>&1 | FileCheck -check-prefix=CHECK_UCRT %s
 
 // CHECK_DEFAULT: "-lmingwex" "-lmsvcrt" "-ladvapi32"
 // CHECK_MSVCR120: "-lmsvcr120"
 // CHECK_MSVCR120-SAME: "-lmingwex" "-ladvapi32"
+// CHECK_UCRTBASE: "-lucrtbase"
+// CHECK_UCRTBASE-SAME: "-lmingwex" "-ladvapi32"
+// CHECK_UCRT: "-lucrt"
+// CHECK_UCRT-SAME: "-lmingwex" "-ladvapi32"