diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ab6c4e77..d9adb022 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -7,6 +7,8 @@ set(LIBSSH_PUBLIC_INCLUDE_DIRS
 
 set(LIBSSH_PRIVATE_INCLUDE_DIRS
   ${CMAKE_BINARY_DIR}
+  ${OPENSSL_INCLUDE_DIRS}
+  ${GCRYPT_INCLUDE_DIRS}
   ${ZLIB_INCLUDE_DIRS}
 )