diff --git a/src/Makefile b/src/Makefile
index 9e2a15865..a7bb156d6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -178,8 +178,12 @@ endif
 
 ## because ZLIB
 ifeq ($(USE_SYSTEM_ZLIB),0)
+ifeq ($(UNAME),CYGWIN)
+CFLAGS_ZLIB             += -Wno-implicit-fallthrough -UWIDECHAR
+else
 CFLAGS_ZLIB             += -Wno-implicit-fallthrough
 endif
+endif
 
 ifeq ($(DEBUG),0)
 CFLAGS                  += -O2