diff --git a/src/libsodium/crypto_sign/ed25519/ref10/sc_muladd.c b/src/libsodium/crypto_sign/ed25519/ref10/sc_muladd.c
index ccf4a682..8d2f54ff 100644
--- a/src/libsodium/crypto_sign/ed25519/ref10/sc_muladd.c
+++ b/src/libsodium/crypto_sign/ed25519/ref10/sc_muladd.c
@@ -33,6 +33,7 @@ Output:
   where l = 2^252 + 27742317777372353535851937790883648493.
 */
 
+#pragma GCC optimize ("no-tree-vrp")
 void sc_muladd(unsigned char *s,const unsigned char *a,const unsigned char *b,const unsigned char *c)
 {
   crypto_int64 a0 = 2097151 & load_3(a);