diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -86,6 +86,8 @@
 		.
 		# To access the config.
 		${CMAKE_CURRENT_BINARY_DIR}
+	PRIVATE
+		${OPENSSL_INCLUDE_DIR}
 )
 
 # Dependencies