diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index aceabd0a7..2d2c00fbb 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1670,12 +1670,12 @@ func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transa
 		if err != nil {
 			return 0, fmt.Errorf("%w: invalid return value", ErrVerificationFailed)
 		}
-		if !res {
-			return 0, fmt.Errorf("%w: invalid signature", ErrVerificationFailed)
-		}
 		if vm.Estack().Len() != 0 {
 			return 0, fmt.Errorf("%w: expected exactly one returned value", ErrVerificationFailed)
 		}
+		if !res {
+			return 0, fmt.Errorf("%w: invalid signature", ErrVerificationFailed)
+		}
 	} else {
 		return 0, fmt.Errorf("%w: no result returned from the script", ErrVerificationFailed)
 	}