diff --git a/plugins/axiomcode/hooks/enrich.py b/plugins/axiomcode/hooks/enrich.py
index 72d36cc9..f99c67cc 100755
--- a/plugins/axiomcode/hooks/enrich.py
+++ b/plugins/axiomcode/hooks/enrich.py
@@ -556,7 +556,7 @@ def lookup(n):
         if total > len(rows) and out: out[-1] += f"  (+{total - len(rows)} more declaration(s){'' if total < 40 else ' or more'})"
         if unres: out.append(f"  ({ctx_names.get(unres[0]['caller_id'], '?')}, which you just read, calls a `{n}` at L{unres[0]['start_line']} whose receiver is not typed — it may be any of the above)")
         return n, rows, out
-    if idents and os.environ.get('AXIOMCODE_GREP_AID', '1') != '0':
+    if idents and os.environ.get('AXIOMCODE_GREP_AID', '1').lower() not in ('0', 'off', 'false'):
         lines += grep_aid(idents, ev.get('tool_response'))
     elif idents:
         with concurrent.futures.ThreadPoolExecutor(max_workers=min(6, len(idents))) as ex: found = list(ex.map(lookup, idents))
diff --git a/plugins/axiomcode/skills/axiomcode/scripts/ax_blocks.py b/plugins/axiomcode/skills/axiomcode/scripts/ax_blocks.py
index 09574d9c..78559617 100644
--- a/plugins/axiomcode/skills/axiomcode/scripts/ax_blocks.py
+++ b/plugins/axiomcode/skills/axiomcode/scripts/ax_blocks.py
@@ -105,7 +105,7 @@ def render(verb, doc, repo):
     # `grep -nw NAME` finds: it is listed by location only, and the code goes to the places no text search reaches
     # (a function passed as a value, a framework or DI registration, an alias). Off with AXIOMCODE_GREP_AID=0.
     plain = []
-    names = target_names(doc) if verb == 'impact' and os.environ.get('AXIOMCODE_GREP_AID', '1') != '0' else []
+    names = target_names(doc) if verb == 'impact' and os.environ.get('AXIOMCODE_GREP_AID', '1').lower() not in ('0', 'off', 'false') else []
     if names:
         spelled = lambda p: all(any(re.search(r'(?<![\w$])' + re.escape(nm) + r'(?![\w$])', statement(repo, p['f'], n)) for nm in names)
                                 for n in p['marks'])