diff --git a/dep/recastnavigation/CMakeLists.txt b/dep/recastnavigation/CMakeLists.txt
index ab2c5618bfd..a7c4aa70186 100644
--- a/dep/recastnavigation/CMakeLists.txt
+++ b/dep/recastnavigation/CMakeLists.txt
@@ -17,4 +17,6 @@
 #
 
 add_subdirectory(Detour)
-add_subdirectory(Recast)
+if(TOOLS)
+  add_subdirectory(Recast)
+endif()