diff --git a/src/crypto/elliptic/p256_s390x.go b/src/crypto/elliptic/p256_s390x.go
index 2ed4c0b9e7d..45cd2915f92 100644
--- a/src/crypto/elliptic/p256_s390x.go
+++ b/src/crypto/elliptic/p256_s390x.go
@@ -32,7 +32,10 @@ func hasVectorFacility() bool
 var hasVX = hasVectorFacility()
 
 func initP256Arch() {
-	if hasVX {
+	// Assembly implementation is temporarily disabled until issue
+	// #20215 is fixed.
+	// if hasVX {
+	if false {
 		p256 = p256CurveFast{p256Params}
 		initTable()
 		return