diff --git a/libs/srtp/crypto/include/datatypes.h b/libs/srtp/crypto/include/datatypes.h
index e523ea62f0..11078e6dc4 100644
--- a/libs/srtp/crypto/include/datatypes.h
+++ b/libs/srtp/crypto/include/datatypes.h
@@ -399,7 +399,7 @@ octet_string_set_to_zero(uint8_t *s, int len);
 # define be64_to_cpu(x)	bswap_64((x))
 #else
 
-#if defined(__GNUC__) && defined(HAVE_X86) && !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__)
+#if defined(__GNUC__) && defined(HAVE_X86) && !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(__sun)
 /* Fall back. */
 static inline uint32_t be32_to_cpu(uint32_t v) {
    /* optimized for x86. */