diff --git a/src/wget.h b/src/wget.h
index cbac4678..23f0350d 100644
--- a/src/wget.h
+++ b/src/wget.h
@@ -144,7 +144,7 @@ typedef int64_t wgint;
 #define WGINT_MIN INT64_MIN
 #define WGINT_MAX INT64_MAX
 
-#define str_to_wgint strtol
+#define str_to_wgint strtoll
 
 #include "options.h"