diff --git a/ecc/bw6-761/fr/mimc/mimc.go b/ecc/bw6-761/fr/mimc/mimc.go
index d575a63d9..4fc1df03a 100644
--- a/ecc/bw6-761/fr/mimc/mimc.go
+++ b/ecc/bw6-761/fr/mimc/mimc.go
@@ -142,13 +142,9 @@ func (d *digest) checksum() fr.Element {
 func (d *digest) encrypt(m fr.Element) fr.Element {
 	once.Do(initConstants) // init constants
 
-	var tmp fr.Element
 	for i := 0; i < mimcNbRounds; i++ {
-		// m = (m+k+c)^5
-		tmp.Add(&m, &d.h).Add(&tmp, &mimcConstants[i])
-		m.Square(&tmp).
-			Square(&m).
-			Mul(&m, &tmp)
+		// m = 1/(m+k+c)
+		m.Add(&m, &d.h).Add(&m, &mimcConstants[i]).Inverse(&m)
 	}
 	m.Add(&m, &d.h)
 	return m
diff --git a/internal/generator/crypto/hash/mimc/template/mimc.go.tmpl b/internal/generator/crypto/hash/mimc/template/mimc.go.tmpl
index f396c8644..d58937271 100644
--- a/internal/generator/crypto/hash/mimc/template/mimc.go.tmpl
+++ b/internal/generator/crypto/hash/mimc/template/mimc.go.tmpl
@@ -177,6 +177,20 @@ func (d *digest) encrypt(m fr.Element) fr.Element {
 	m.Add(&m, &d.h)
 	return m
 }
+{{ else if eq .Name "bw6-761" }}
+// plain execution of a mimc run
+// m: message
+// k: encryption key
+func (d *digest) encrypt(m fr.Element) fr.Element {
+	once.Do(initConstants) // init constants
+
+	for i := 0; i < mimcNbRounds; i++ {
+		// m = 1/(m+k+c)
+		m.Add(&m, &d.h).Add(&m, &mimcConstants[i]).Inverse(&m)
+	}
+	m.Add(&m, &d.h)
+	return m
+}
 {{ else }}
 // plain execution of a mimc run
 // m: message