diff --git a/src/fs/io/StdioOutputStream.hxx b/src/fs/io/StdioOutputStream.hxx
index af6dd5f51..b7fb1cb4a 100644
--- a/src/fs/io/StdioOutputStream.hxx
+++ b/src/fs/io/StdioOutputStream.hxx
@@ -39,7 +39,7 @@ class StdioOutputStream final : public OutputStream {
 	FILE *const file;
 
 public:
-	explicit StdioOutputStream(FILE *_file):file(_file) {}
+	explicit StdioOutputStream(FILE *_file) noexcept:file(_file) {}
 
 	/* virtual methods from class OutputStream */
 	void Write(const void *data, size_t size) override {