diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1377f8230..1a1c6da7a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -430,11 +430,11 @@ ENDIF("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
 SET(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "add a postfix, usually d on windows")
 ADD_DEFINITIONS(-DOSG_DEBUG_POSTFIX=${CMAKE_DEBUG_POSTFIX})
 
-IF(UNIX AND NOT WIN32 AND NOT APPLE)
+IF(UNIX AND NOT WIN32)
   IF(CMAKE_BUILD_TYPE STREQUAL "Debug")
     ADD_DEFINITIONS("-D_DEBUG")
   ENDIF(CMAKE_BUILD_TYPE STREQUAL "Debug")
-ENDIF(UNIX AND NOT WIN32 AND NOT APPLE)
+ENDIF(UNIX AND NOT WIN32)
 
 IF(CYGWIN)
   IF(CMAKE_BUILD_TYPE STREQUAL "Debug")