diff --git a/lib/cretonne/meta/gen_encoding.py b/lib/cretonne/meta/gen_encoding.py
index 0516b5c4c8..a9bef26dba 100644
--- a/lib/cretonne/meta/gen_encoding.py
+++ b/lib/cretonne/meta/gen_encoding.py
@@ -88,7 +88,7 @@ def emit_instp(instp, fmt, has_dfg=False):
     # Deal with pure type check predicates which apply to any instruction.
     if iform == instruction_context:
         fmt.line('let args = inst.arguments(&dfg.value_lists);')
-        fmt.format('return {};', instp.rust_predicate(0))
+        fmt.line(instp.rust_predicate(0))
         return
 
     assert isinstance(iform, InstructionFormat)