diff --git a/tests/tests-c-compiler/check-src/check-70.-fwide-types.c b/tests/tests-c-compiler/check-src/check-70.-fwide-types.c
index 5e450b6..8152346 100644
--- a/tests/tests-c-compiler/check-src/check-70.-fwide-types.c
+++ b/tests/tests-c-compiler/check-src/check-70.-fwide-types.c
@@ -277,6 +277,19 @@
 	return 1;
 }
 
+#ifdef ENABLE_LIBFUZZER
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+    PDU_t *st = 0;
+    asn_dec_rval_t rval;
+    rval = asn_decode(0, ATS_BASIC_XER, &asn_DEF_PDU, (void **)&st, Data, Size);
+    assert(rval.consumed <= Size);
+    ASN_STRUCT_FREE(asn_DEF_PDU, st);
+    return 0;
+}
+
+#else
+
 int
 main() {
 	DIR *dir;
@@ -309,3 +322,4 @@
 	return 0;
 }
 
+#endif