diff --git a/lib/idn2.h.in b/lib/idn2.h.in
index 703477e..0c37b2e 100644
--- a/lib/idn2.h.in
+++ b/lib/idn2.h.in
@@ -104,8 +104,6 @@ extern "C"
  */
 # if GCC_VERSION_AT_LEAST(3,1)
 #  define G_GNUC_DEPRECATED __attribute__((deprecated))
-# elif defined(_MSC_VER)
-#  define G_GNUC_DEPRECATED __declspec(deprecated)
 # else
 #  define G_GNUC_DEPRECATED	/* empty */
 # endif