diff --git a/CMakeLists.txt b/CMakeLists.txt
index 415edf7a1..6e8195da2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -349,9 +349,9 @@ ENDIF("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
 
 SET(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "add a postfix, usually d on windows")
 IF(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} GREATER 4)
-  ADD_DEFINITIONS("-DOSG_DEBUG_POSTFIX=${CMAKE_DEBUG_POSTFIX} ")
+  ADD_DEFINITIONS(-DOSG_DEBUG_POSTFIX="${CMAKE_DEBUG_POSTFIX}")
 ELSE(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} GREATER 4)
-  ADD_DEFINITIONS("-DOSG_DEBUG_POSTFIX='\"${CMAKE_DEBUG_POSTFIX}\"'")
+  ADD_DEFINITIONS(-DOSG_DEBUG_POSTFIX='\"${CMAKE_DEBUG_POSTFIX}\"')
 ENDIF(${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} GREATER 4)
 IF(UNIX AND NOT WIN32 AND NOT APPLE)
   IF(CMAKE_BUILD_TYPE STREQUAL "Debug")