diff --git a/Externals/minizip-ng/CMakeLists.txt b/Externals/minizip-ng/CMakeLists.txt
index 3a2e7e6b67..56df835f64 100644
--- a/Externals/minizip-ng/CMakeLists.txt
+++ b/Externals/minizip-ng/CMakeLists.txt
@@ -1,5 +1,8 @@
 project(minizip C)
 
+include(CheckFunctionExists)
+include(CheckIncludeFile)
+
 add_library(minizip STATIC
   minizip-ng/mz.h
   minizip-ng/mz_compat.c