diff --git a/clang/utils/TableGen/ClangAttrEmitter.cpp b/clang/utils/TableGen/ClangAttrEmitter.cpp
index 2c25932bc78f..b6d1e24b907f 100644
--- a/clang/utils/TableGen/ClangAttrEmitter.cpp
+++ b/clang/utils/TableGen/ClangAttrEmitter.cpp
@@ -194,6 +194,11 @@ namespace {
         lowerName[0] = std::tolower(lowerName[0]);
         upperName[0] = std::toupper(upperName[0]);
       }
+      // Work around MinGW's macro definition of 'interface' to 'struct'. We
+      // have an attribute argument called 'Interface', so only the lower case
+      // name conflicts with the macro definition.
+      if (lowerName == "interface")
+        lowerName = "interface_";
     }
     virtual ~Argument() = default;