1 files changed, 1 insertions, 1 deletions
diff --git a/include/amber/result.h b/include/amber/result.h
index ec57289..d74156d 100644
--- a/include/amber/result.h
+++ b/include/amber/result.h
@@ -23,7 +23,7 @@ namespace amber {
 class Result {
  public:
   Result();
-  Result(const std::string& err);
+  explicit Result(const std::string& err);
   Result(const Result&);
   ~Result();