1 files changed, 1 insertions, 1 deletions
diff --git a/utils/TableGen/DAGISelEmitter.h b/utils/TableGen/DAGISelEmitter.h
index 2f626f6b86..1b9f8bad88 100644
--- a/utils/TableGen/DAGISelEmitter.h
+++ b/utils/TableGen/DAGISelEmitter.h
@@ -27,7 +27,7 @@ class DAGISelEmitter : public TableGenBackend {
   RecordKeeper &Records;
   CodeGenDAGPatterns CGP;
 public:
-  DAGISelEmitter(RecordKeeper &R) : Records(R), CGP(R) {}
+  explicit DAGISelEmitter(RecordKeeper &R) : Records(R), CGP(R) {}
 
   // run - Output the isel, returning true on failure.
   void run(std::ostream &OS);