1 files changed, 2 insertions, 0 deletions
diff --git a/src/tool_doswin.c b/src/tool_doswin.c
index 98e13bc09..1ad9cddc3 100644
--- a/src/tool_doswin.c
+++ b/src/tool_doswin.c
@@ -766,6 +766,8 @@ bool tool_isVistaOrGreater;
 
 CURLcode win32_init(void)
 {
+  /* curlx_verify_windows_version must be called during init at least once
+     because it has its own initialization routine. */
   if(curlx_verify_windows_version(6, 0, PLATFORM_WINNT,
                                   VERSION_GREATER_THAN_EQUAL))
     tool_isVistaOrGreater = true;