diff --git a/x/auth/ante.go b/x/auth/ante.go
index 4be1c6674d..bf70b3e9b6 100644
--- a/x/auth/ante.go
+++ b/x/auth/ante.go
@@ -8,6 +8,10 @@ import (
 	"github.com/spf13/viper"
 )
 
+const (
+	VerifyCost = 100
+)
+
 // NewAnteHandler returns an AnteHandler that checks
 // and increments sequence numbers, checks signatures,
 // and deducts fees from the first signer.
@@ -134,6 +138,7 @@ func processSig(
 	}
 
 	// Check sig.
+	ctx.GasMeter().ConsumeGas(VerifyCost, "ante verify")
 	if !pubKey.VerifyBytes(signBytes, sig.Signature) {
 		return nil, sdk.ErrUnauthorized("signature verification failed").Result()
 	}