diff --git a/tests/libtest/lib3026.c b/tests/libtest/lib3026.c
index 6b32940b79..d75b27d656 100644
--- a/tests/libtest/lib3026.c
+++ b/tests/libtest/lib3026.c
@@ -27,7 +27,7 @@
 
 #ifdef _WIN32
 #include <process.h>
-static CURL_THREAD_RETURN_T WINAPI t3026_run_thread(void *ptr)
+static CURL_THREAD_RETURN_T __stdcall t3026_run_thread(void *ptr)
 {
   CURLcode *result = ptr;