diff --git a/xs/src/slic3r/Utils/Http.cpp b/xs/src/slic3r/Utils/Http.cpp
index 47021d39f..949a0e7d6 100644
--- a/xs/src/slic3r/Utils/Http.cpp
+++ b/xs/src/slic3r/Utils/Http.cpp
@@ -71,6 +71,7 @@ Http::priv::priv(const std::string &url) :
 	form(nullptr),
 	form_end(nullptr),
 	headerlist(nullptr),
+	limit(0),
 	cancel(false)
 {
 	if (curl == nullptr) {
diff --git a/xs/src/slic3r/Utils/Http.hpp b/xs/src/slic3r/Utils/Http.hpp
index 73656bf88..7c2bd84fc 100644
--- a/xs/src/slic3r/Utils/Http.hpp
+++ b/xs/src/slic3r/Utils/Http.hpp
@@ -46,7 +46,8 @@ public:
 	Http& operator=(const Http &) = delete;
 	Http& operator=(Http &&) = delete;
 
-	// Sets a maximum size of the data that can be received. The default is 5MB.
+	// Sets a maximum size of the data that can be received.
+	// A value of zero sets the default limit, which is is 5MB.
 	Http& size_limit(size_t sizeLimit);
 	// Sets a HTTP header field.
 	Http& header(std::string name, const std::string &value);