diff --git a/dlls/CMakeLists.txt b/dlls/CMakeLists.txt
index 1109ea14..ab0dfb7f 100644
--- a/dlls/CMakeLists.txt
+++ b/dlls/CMakeLists.txt
@@ -645,7 +645,7 @@ if(UNIX)
 	
 elseif(MSVC)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /W4") 
-	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DEF:${CMAKE_CURRENT_SOURCE_DIR}/hl.def") 
+	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DEF:\"${CMAKE_CURRENT_SOURCE_DIR}/hl.def\"") 
 	
 	set_target_properties(${SERVER_DLL_NAME} PROPERTIES
 		VS_DEBUGGER_COMMAND "${SERVER_WORK_DIR}/${SERVER_EXE}"