diff --git a/build/config/CYGWIN b/build/config/CYGWIN
index f8fe43766..70e88d102 100644
--- a/build/config/CYGWIN
+++ b/build/config/CYGWIN
@@ -46,7 +46,7 @@ IMPLIBLINKEXT    = .dll.a
 CFLAGS          = 
 CFLAGS32        = 
 CFLAGS64        = 
-CXXFLAGS        = -DPOCO_NO_FPENVIRONMENT -DPOCO_NO_SHAREDMEMORY
+CXXFLAGS        = -DPOCO_NO_FPENVIRONMENT -DPOCO_NO_WSTRING
 CXXFLAGS32      =
 CXXFLAGS64      = -Wa,-mbig-obj
 SHLIBFLAGS      =