diff --git a/commands.cpp b/commands.cpp
index d81c31c..fcd5851 100644
--- a/commands.cpp
+++ b/commands.cpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #include "commands.hpp"
diff --git a/commands.hpp b/commands.hpp
index baa03c2..ce68129 100644
--- a/commands.hpp
+++ b/commands.hpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #ifndef _COMMANDS_H
diff --git a/crypto.cpp b/crypto.cpp
index e1f3653..e1a8594 100644
--- a/crypto.cpp
+++ b/crypto.cpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #define _BSD_SOURCE
diff --git a/crypto.hpp b/crypto.hpp
index 6e31840..e8166e2 100644
--- a/crypto.hpp
+++ b/crypto.hpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #ifndef _CRYPTO_H
diff --git a/git-crypt.cpp b/git-crypt.cpp
index a19834a..209501b 100644
--- a/git-crypt.cpp
+++ b/git-crypt.cpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #include "commands.hpp"
diff --git a/util.cpp b/util.cpp
index ccde427..4ae39c7 100644
--- a/util.cpp
+++ b/util.cpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #include "util.hpp"
diff --git a/util.hpp b/util.hpp
index 2c8416b..722d0de 100644
--- a/util.hpp
+++ b/util.hpp
@@ -15,6 +15,17 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with git-crypt.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Additional permission under GNU GPL version 3 section 7:
+ *
+ * If you modify the Program, or any covered work, by linking or
+ * combining it with the OpenSSL project's OpenSSL library (or a
+ * modified version of that library), containing parts covered by the
+ * terms of the OpenSSL or SSLeay licenses, the licensors of the Program
+ * grant you additional permission to convey the resulting work.
+ * Corresponding Source for a non-source form of such a combination
+ * shall include the source code for the parts of OpenSSL used as well
+ * as that of the covered work.
  */
 
 #ifndef _UTIL_H