diff --git a/main.cpp b/main.cpp
index 8f6dd2f..569447e 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,6 @@
 #include <iostream>
 #include <vector>
+#include <curl/curl.h>
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
@@ -30,7 +31,12 @@ input_data(istream& in, bool prompt){
     return inp;
 }
 
-int main(){
+int main(int argc, char* argv[]){
+    curl_global_init(CURL_GLOBAL_ALL);
+    if (argc > 1){
+        cerr << "argv[0] = " << argv[0] << "argc = " << argc;
+        return 0;
+    }
     auto in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     auto borders = make_borders(in.numbers, in.bin_count);