diff --git a/crypto/signature_cgo.go b/crypto/signature_cgo.go
index 1fe84509e..843360298 100644
--- a/crypto/signature_cgo.go
+++ b/crypto/signature_cgo.go
@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-// +build !nacl,!js,cgo
+// +build !nacl,!js,cgo,!gofuzz
 
 package crypto
 
diff --git a/crypto/signature_nocgo.go b/crypto/signature_nocgo.go
index 067d32e13..77c8a1db0 100644
--- a/crypto/signature_nocgo.go
+++ b/crypto/signature_nocgo.go
@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-// +build nacl js !cgo
+// +build nacl js !cgo gofuzz
 
 package crypto