diff --git a/cmake/libraries/curl.cmake b/cmake/libraries/curl.cmake
index c0ca61eb..5561e396 100644
--- a/cmake/libraries/curl.cmake
+++ b/cmake/libraries/curl.cmake
@@ -8,8 +8,8 @@ find_package(CURL QUIET)
 
 if(NOT CURL_FOUND)
     set(CURL_DEFINITIONS USE_INTERNAL_CURL_HEADERS)
-    set(CURL_INCLUDE_DIR ${INTERNAL_CURL_DIR}/include)
+    set(CURL_INCLUDE_DIRS ${INTERNAL_CURL_DIR}/include)
 endif()
 
 list(APPEND CLIENT_DEFINITIONS ${CURL_DEFINITIONS})
-list(APPEND CLIENT_INCLUDE_DIRS ${CURL_INCLUDE_DIR})
+list(APPEND CLIENT_INCLUDE_DIRS ${CURL_INCLUDE_DIRS})