diff --git a/loopy/kernel/creation.py b/loopy/kernel/creation.py
index 4134b11ce9d258f17288fe487be628ff2e2d0abb..0f7e783a3381eb2828e7ebc308e6f467842b6b13 100644
--- a/loopy/kernel/creation.py
+++ b/loopy/kernel/creation.py
@@ -347,15 +347,8 @@ def parse_insn_options(opt_dict, options_str, assignee_names=None):
             new_predicates = set(result["predicates"])
 
             for pred in predicates:
-                from pymbolic.primitives import LogicalNot
                 from loopy.symbolic import parse
-                if pred.startswith("!"):
-                    from warnings import warn
-                    warn("predicates starting with '!' are deprecated. "
-                            "Simply use 'not' instead")
-                    pred = LogicalNot(parse(pred[1:]))
-                else:
-                    pred = parse(pred)
+                pred = parse(pred)
 
                 new_predicates.add(pred)
 
diff --git a/loopy/kernel/instruction.py b/loopy/kernel/instruction.py
index ed18e2ba4531da0d7ccacc778b7a9ed59eee0c3a..b6d2e5212f778df27507a4723f18ccb0e2ea4ad7 100644
--- a/loopy/kernel/instruction.py
+++ b/loopy/kernel/instruction.py
@@ -229,14 +229,8 @@ class InstructionBase(ImmutableRecord, Taggable):
         new_predicates = set()
         for pred in predicates:
             if isinstance(pred, str):
-                from pymbolic.primitives import LogicalNot
                 from loopy.symbolic import parse
-                if pred.startswith("!"):
-                    warn("predicates starting with '!' are deprecated. "
-                            "Simply use 'not' instead")
-                    pred = LogicalNot(parse(pred[1:]))
-                else:
-                    pred = parse(pred)
+                pred = parse(pred)
 
             new_predicates.add(pred)