diff --git a/src/libsodium/crypto_core/curve25519/ref10/curve25519_ref10.c b/src/libsodium/crypto_core/curve25519/ref10/curve25519_ref10.c
index 40e0a1b4..9375274d 100644
--- a/src/libsodium/crypto_core/curve25519/ref10/curve25519_ref10.c
+++ b/src/libsodium/crypto_core/curve25519/ref10/curve25519_ref10.c
@@ -1804,6 +1804,10 @@ ge_double_scalarmult_vartime(ge_p2 *r, const unsigned char *a, const ge_p3 *A,
     }
 }
 
+#ifndef MINIMAL
+
+/* only used for verification of legacy (edwards25519sha512batch) signatures */
+
 void
 ge_scalarmult_vartime(ge_p3 *r, const unsigned char *a, const ge_p3 *A)
 {
@@ -1863,6 +1867,8 @@ ge_scalarmult_vartime(ge_p3 *r, const unsigned char *a, const ge_p3 *A)
     }
 }
 
+#endif
+
 void
 ge_scalarmult_base(ge_p3 *h, const unsigned char *a)
 {