diff --git a/configure.ac b/configure.ac
index 0d55bece5..a4109effc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2601,7 +2601,11 @@ if test "x$openssl" = "xyes" ; then
 		fd = fopen(DATA,"w");
 		if(fd == NULL)
 			exit(1);
-
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+# define OpenSSL_version_num	SSLeay
+# define OpenSSL_version	SSLeay_version
+# define OPENSSL_VERSION	SSLEAY_VERSION
+#endif
 		if ((rc = fprintf(fd, "%08lx (%s)\n",
 		    (unsigned long)OpenSSL_version_num(),
 		    OpenSSL_version(OPENSSL_VERSION))) < 0)
@@ -2646,6 +2650,9 @@ if test "x$openssl" = "xyes" ; then
 	#include <openssl/opensslv.h>
 	#include <openssl/crypto.h>
 		]], [[
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+# define OpenSSL_version_num SSLeay
+#endif
 		exit(OpenSSL_version_num() == OPENSSL_VERSION_NUMBER ? 0 : 1);
 		]])],
 		[
diff --git a/openbsd-compat/openssl-compat.h b/openbsd-compat/openssl-compat.h
index 9e0264c04..0fbf60df4 100644
--- a/openbsd-compat/openssl-compat.h
+++ b/openbsd-compat/openssl-compat.h
@@ -33,6 +33,12 @@ int ssh_compatible_openssl(long, long);
 # error OpenSSL 0.9.8f or greater is required
 #endif
 
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+# define OpenSSL_version_num	SSLeay
+# define OpenSSL_version	SSLeay_version
+# define OPENSSL_VERSION	SSLEAY_VERSION
+#endif
+
 #if OPENSSL_VERSION_NUMBER < 0x10000001L
 # define LIBCRYPTO_EVP_INL_TYPE unsigned int
 #else