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-rw-r--r--ext/digest/sha2/sha2init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/digest/sha2/sha2init.c b/ext/digest/sha2/sha2init.c
index d627beba6e7..2b0585543af 100644
--- a/ext/digest/sha2/sha2init.c
+++ b/ext/digest/sha2/sha2init.c
@@ -29,7 +29,7 @@ FOREACH_BITLEN(DEFINE_ALGO_METADATA)
* Standards and Technology), described in FIPS PUB 180-2.
*/
void
-Init_sha2()
+Init_sha2(void)
{
VALUE mDigest, cDigest_Base;
ID id_metadata;