diff --git a/src/crypto/crypto.h b/src/crypto/crypto.h
index 68476dbce..440da0302 100644
--- a/src/crypto/crypto.h
+++ b/src/crypto/crypto.h
@@ -656,17 +656,6 @@ int crypto_bignum_sqrmod(const struct crypto_bignum *a,
 			 const struct crypto_bignum *b,
 			 struct crypto_bignum *c);
 
-/**
- * crypto_bignum_sqrtmod - returns sqrt(a) (mod b)
- * @a: Bignum
- * @b: Bignum
- * @c: Bignum; used to store the result
- * Returns: 0 on success, -1 on failure
- */
-int crypto_bignum_sqrtmod(const struct crypto_bignum *a,
-			  const struct crypto_bignum *b,
-			  struct crypto_bignum *c);
-
 /**
  * crypto_bignum_rshift - r = a >> n
  * @a: Bignum
diff --git a/src/crypto/crypto_openssl.c b/src/crypto/crypto_openssl.c
index ed463105e..783b293e9 100644
--- a/src/crypto/crypto_openssl.c
+++ b/src/crypto/crypto_openssl.c
@@ -1533,27 +1533,6 @@ int crypto_bignum_sqrmod(const struct crypto_bignum *a,
 }
 
 
-int crypto_bignum_sqrtmod(const struct crypto_bignum *a,
-			  const struct crypto_bignum *b,
-			  struct crypto_bignum *c)
-{
-	BN_CTX *bnctx;
-	BIGNUM *res;
-
-	if (TEST_FAIL())
-		return -1;
-
-	bnctx = BN_CTX_new();
-	if (!bnctx)
-		return -1;
-	res = BN_mod_sqrt((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b,
-			  bnctx);
-	BN_CTX_free(bnctx);
-
-	return res ? 0 : -1;
-}
-
-
 int crypto_bignum_rshift(const struct crypto_bignum *a, int n,
 			 struct crypto_bignum *r)
 {
diff --git a/src/crypto/crypto_wolfssl.c b/src/crypto/crypto_wolfssl.c
index 3069b4a7a..85ce565bd 100644
--- a/src/crypto/crypto_wolfssl.c
+++ b/src/crypto/crypto_wolfssl.c
@@ -1226,15 +1226,6 @@ int crypto_bignum_sqrmod(const struct crypto_bignum *a,
 }
 
 
-int crypto_bignum_sqrtmod(const struct crypto_bignum *a,
-			  const struct crypto_bignum *b,
-			  struct crypto_bignum *c)
-{
-	/* TODO */
-	return -1;
-}
-
-
 int crypto_bignum_rshift(const struct crypto_bignum *a, int n,
 			 struct crypto_bignum *r)
 {