diff --git a/tests/libtest/lib3207.c b/tests/libtest/lib3207.c
index 310629a9be..e3b50ff40f 100644
--- a/tests/libtest/lib3207.c
+++ b/tests/libtest/lib3207.c
@@ -68,13 +68,11 @@ static size_t write_memory_callback(char *contents, size_t size,
   return realsize;
 }
 
-static
 #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
-CURL_THREAD_RETURN_T CURL_STDCALL
+static CURL_THREAD_RETURN_T CURL_STDCALL test_thread(void *ptr)
 #else
-unsigned int
+static unsigned int test_thread(void *ptr)
 #endif
-test_thread(void *ptr)
 {
   struct Ctx *ctx = (struct Ctx *)ptr;
   CURLcode res = CURLE_OK;