diff --git a/projects/pycparser/build.sh b/projects/pycparser/build.sh
index 338e12e52..1787d5330 100644
--- a/projects/pycparser/build.sh
+++ b/projects/pycparser/build.sh
@@ -20,3 +20,5 @@ pip3 install .
 for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
   compile_python_fuzzer $fuzzer
 done
+
+zip $OUT/fuzz_c_parser_seed_corpus.zip ./tests/c_files/*.c
diff --git a/projects/pycparser/fuzz_c_parser.py b/projects/pycparser/fuzz_c_parser.py
index e529c6f08..c088c3941 100644
--- a/projects/pycparser/fuzz_c_parser.py
+++ b/projects/pycparser/fuzz_c_parser.py
@@ -23,13 +23,14 @@ pysecsan.add_hooks()
 
 def TestOneInput(data):
   fdp = atheris.FuzzedDataProvider(data)
+  c_source = fdp.ConsumeUnicodeNoSurrogates(sys.maxsize)
   _c_parser = pycparser.c_parser.CParser(
-                lex_optimize=False,
-                yacc_debug=False,
-                yacc_optimize=False)
+                lex_optimize=fdp.ConsumeBool(),
+                yacc_debug=fdp.ConsumeBool(),
+                yacc_optimize=fdp.ConsumeBool())
   try:
     _c_parser.parse(
-        fdp.ConsumeUnicodeNoSurrogates(1024),
+        c_source,
         ''
     )
   except pycparser.c_parser.ParseError: