1 files changed, 1 insertions, 1 deletions
diff --git a/src/Net.h b/src/Net.h
index b58eefb5a..f21d77fb9 100644
--- a/src/Net.h
+++ b/src/Net.h
@@ -91,7 +91,7 @@ struct Ban {
 #if Q_BYTE_ORDER == Q_BIG_ENDIAN
 #define SWAP64(x) (x)
 #else
-#ifdef __x86_64__
+#if defined(__x86_64__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
 #define SWAP64(x) __builtin_bswap64(x)
 #else
 #define SWAP64(x) qbswap<quint64>(x)