diff --git a/.pick_status.json b/.pick_status.json
index b98bdd5717a..6b2c5915e29 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -5144,7 +5144,7 @@
         "description": "nir/algebraic: Detect missing f on F-strings",
         "nominated": true,
         "nomination_type": 2,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "c49d6e048087a3a6fd17ca56c1e887c697624adf",
         "notes": null
diff --git a/src/compiler/nir/nir_algebraic.py b/src/compiler/nir/nir_algebraic.py
index 5ead743c8c3..8770dcddbc2 100644
--- a/src/compiler/nir/nir_algebraic.py
+++ b/src/compiler/nir/nir_algebraic.py
@@ -107,6 +107,9 @@ class SearchExpression(object):
       self.sources = expr[1:]
       self.ignore_exact = False
 
+      assert '{' not in self.opcode, \
+          'Malformed opcode name \"{}\".'.format(self.opcode)
+
    @staticmethod
    def create(val):
       if isinstance(val, tuple):