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-rw-r--r--ext/digest/sha1/sha1ossl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/digest/sha1/sha1ossl.h b/ext/digest/sha1/sha1ossl.h
index e8d7e74baf4..c271cc47c64 100644
--- a/ext/digest/sha1/sha1ossl.h
+++ b/ext/digest/sha1/sha1ossl.h
@@ -3,6 +3,7 @@
#ifndef SHA1OSSL_H_INCLUDED
#define SHA1OSSL_H_INCLUDED
+#include <stddef.h>
#include <openssl/sha.h>
#define SHA1_CTX SHA_CTX