diff --git a/code/ryzom/CMakeLists.txt b/code/ryzom/CMakeLists.txt
index db44a106a..aac342408 100644
--- a/code/ryzom/CMakeLists.txt
+++ b/code/ryzom/CMakeLists.txt
@@ -117,7 +117,7 @@ ENDIF(FINAL_VERSION)
 # config.h configuration and use by projects
 CONFIGURE_FILE(${CMAKE_SOURCE_DIR}/config.h.cmake ${CMAKE_BINARY_DIR}/config.h)
 INCLUDE_DIRECTORIES(${CMAKE_BINARY_DIR})
-ADD_DEFINITIONS(-DHAVE_CONFIG_H=1)
+ADD_DEFINITIONS(-DHAVE_CONFIG_H)
 
 ADD_SUBDIRECTORY(common)