diff --git a/noir_stdlib/src/schnorr.nr b/noir_stdlib/src/schnorr.nr
index 0623f116de..76db04400e 100644
--- a/noir_stdlib/src/schnorr.nr
+++ b/noir_stdlib/src/schnorr.nr
@@ -37,7 +37,7 @@ pub fn verify_signature_noir<let N: u32>(
     if ((sig_s.lo != 0) | (sig_s.hi != 0)) & ((sig_e.lo != 0) | (sig_e.hi != 0)) {
         let (r_is_infinite, result) = calculate_signature_challenge(public_key, sig_s, sig_e, message);
 
-        is_ok = !r_is_infinite;
+        is_ok &= !r_is_infinite;
         for i in 0..32 {
             is_ok &= result[i] == signature[32 + i];
         }