diff --git a/libi2pd/Crypto.h b/libi2pd/Crypto.h
index 2a0a8427..32410daf 100644
--- a/libi2pd/Crypto.h
+++ b/libi2pd/Crypto.h
@@ -28,7 +28,7 @@
 #else
 #   define LEGACY_OPENSSL 0
 #   if (OPENSSL_VERSION_NUMBER >= 0x010101000) // 1.1.1
-#	define OPENSSL_HKDF 1
+#	   define OPENSSL_HKDF 1
 #	   define OPENSSL_EDDSA 1
 #	   define OPENSSL_X25519 1
 #	   define OPENSSL_SIPHASH 1