diff --git a/programs/test/benchmark.c b/programs/test/benchmark.c
index 93c17291f..98ddd4853 100644
--- a/programs/test/benchmark.c
+++ b/programs/test/benchmark.c
@@ -56,6 +56,10 @@ int main(void)
 
 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
 
+#if defined(_MSC_VER)
+#pragma warning(disable : 5105) // warning inside winbase.h in C11 mode
+#endif
+
 #include <windows.h>
 #include <process.h>
 
diff --git a/programs/test/udp_proxy.c b/programs/test/udp_proxy.c
index 43d2e8cf7..b580b06df 100644
--- a/programs/test/udp_proxy.c
+++ b/programs/test/udp_proxy.c
@@ -50,6 +50,11 @@ int main(void)
 /* For select() */
 #if (defined(_WIN32) || defined(_WIN32_WCE)) && !defined(EFIX64) && \
     !defined(EFI32)
+
+#if defined(_MSC_VER)
+#pragma warning(disable : 5105) // warning inside winbase.h in C11 mode
+#endif
+
 #include <winsock2.h>
 #include <windows.h>
 #if defined(_MSC_VER)