diff --git a/serial_transport_win32.c b/serial_transport_win32.c
index ce4cc46..e8e27cb 100644
--- a/serial_transport_win32.c
+++ b/serial_transport_win32.c
@@ -39,7 +39,7 @@
 
 #  if defined(WINCE)
 #    define snprintf _snprintf
-#  else
+#  elif !defined(__GNUC__)
 #    define snprintf sprintf_s
 #  endif