diff --git a/.pick_status.json b/.pick_status.json
index bdaa9be782b..26f6e1dca0f 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -454,7 +454,7 @@
         "description": "nir/opt_algebraic: Fix mask in shift by constant combining.",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "0e6581b87dc4e168fa864cd39e8947a58999189a"
     },
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index 63c2427344f..dcd4c501e4a 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -420,7 +420,7 @@ optimizations.extend([
 # bits of the second source.  These replacements must correctly handle the
 # case where (b % bitsize) + (c % bitsize) >= bitsize.
 for s in [8, 16, 32, 64]:
-   mask = (1 << s) - 1
+   mask = s - 1
 
    ishl = "ishl@{}".format(s)
    ishr = "ishr@{}".format(s)