diff --git a/code/ryzom/server/src/ai_service/CMakeLists.txt b/code/ryzom/server/src/ai_service/CMakeLists.txt
index c22fe6496..fb439820d 100644
--- a/code/ryzom/server/src/ai_service/CMakeLists.txt
+++ b/code/ryzom/server/src/ai_service/CMakeLists.txt
@@ -1,3 +1,6 @@
+IF(APPLE)
+	add_definitions("-ftemplate-depth=100")
+ENDIF()
 FILE(GLOB SRC *.cpp *.h)
 
 LIST(REMOVE_ITEM SRC