1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libcrypto/des/des_ver.h b/src/lib/libcrypto/des/des_ver.h
index 7041a9271d..de3c02f110 100644
--- a/src/lib/libcrypto/des/des_ver.h
+++ b/src/lib/libcrypto/des/des_ver.h
@@ -56,5 +56,6 @@
  * [including the GNU Public Licence.]
  */
 
-extern char *DES_version;       /* SSLeay version string */
-extern char *libdes_version;    /* old libdes version string */
+#include <openssl/e_os2.h>
+OPENSSL_EXTERN char *DES_version;       /* SSLeay version string */
+OPENSSL_EXTERN char *libdes_version;    /* old libdes version string */