diff --git a/fuzzers/036-iob18-ologic/generate.py b/fuzzers/036-iob18-ologic/generate.py
index 5590af52..42c27019 100644
--- a/fuzzers/036-iob18-ologic/generate.py
+++ b/fuzzers/036-iob18-ologic/generate.py
@@ -18,7 +18,7 @@ DEBUG_FUZZER = False
 
 
 def bitfilter(frame, word):
-    return 30 <= frame and frame <= 33
+    return (30 <= frame and frame <= 33) or frame == 38 or frame == 39
 
 def handle_data_width(segmk, d):
     if 'DATA_WIDTH' not in d: