diff --git a/fuse/Fuse.h b/fuse/Fuse.h
index acd5c68d..ae0275ff 100644
--- a/fuse/Fuse.h
+++ b/fuse/Fuse.h
@@ -17,7 +17,7 @@ class Filesystem;
 
 class Fuse {
 public:
-  Fuse(Filesystem *fs);
+  explicit Fuse(Filesystem *fs);
 	virtual ~Fuse();
 
 	void run(int argc, char **argv);
diff --git a/fuse/FuseErrnoException.h b/fuse/FuseErrnoException.h
index 7e73a9ff..0c67bf58 100644
--- a/fuse/FuseErrnoException.h
+++ b/fuse/FuseErrnoException.h
@@ -10,7 +10,7 @@ namespace fuse{
 
 class FuseErrnoException: public std::runtime_error {
 public:
-  FuseErrnoException(int errno_);
+  explicit FuseErrnoException(int errno_);
   virtual ~FuseErrnoException();
 
   int getErrno() const;
diff --git a/impl/FilesystemImpl.h b/impl/FilesystemImpl.h
index 169a8e11..1e209051 100644
--- a/impl/FilesystemImpl.h
+++ b/impl/FilesystemImpl.h
@@ -15,7 +15,7 @@ class OpenFile;
 
 class FilesystemImpl: public fuse::Filesystem {
 public:
-  FilesystemImpl(Device *device);
+  explicit FilesystemImpl(Device *device);
 	virtual ~FilesystemImpl();
 
 	int openFile(const boost::filesystem::path &path, int flags) override;