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-rw-r--r--Misc/NEWS.d/next/Build/2019-11-04-14-30-37.bpo-38684.aed593.rst1
-rw-r--r--Modules/_hashopenssl.c2
2 files changed, 2 insertions, 1 deletions
diff --git a/Misc/NEWS.d/next/Build/2019-11-04-14-30-37.bpo-38684.aed593.rst b/Misc/NEWS.d/next/Build/2019-11-04-14-30-37.bpo-38684.aed593.rst
new file mode 100644
index 0000000..c715ff9
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2019-11-04-14-30-37.bpo-38684.aed593.rst
@@ -0,0 +1 @@
+Fix _hashlib build when Blake2 is disabled, but OpenSSL supports it.
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index b147dbe..360e444 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -42,7 +42,7 @@
#define PY_OPENSSL_HAS_SHAKE 1
#endif
-#ifdef NID_blake2b512
+#if defined(NID_blake2b512) && !defined(OPENSSL_NO_BLAKE2)
#define PY_OPENSSL_HAS_BLAKE2 1
#endif