--- ../1.7.4/test/Makefile.win	2023-04-16 22:07:40.000000000 +0900
+++ test/Makefile.win	2024-06-10 17:29:26.033394600 +0900
@@ -133,7 +133,7 @@
 !ENDIF
 
 !IFDEF _DEBUG
-DEBUG_CFLAGS = /MDd
+DEBUG_CFLAGS = /MDd /D _DEBUG
 !ELSE
 DEBUG_CFLAGS = /MD 
 !ENDIF
@@ -142,7 +142,7 @@
 
 CFLAGS = /nologo /c /W3 /Gm /EHsc /Zi /Od $(INCLUDES) \
 	 $(STATIC_CFLAGS) $(DEBUG_CFLAGS) /D "BINPATH=$(OUTDIR:\=/)" \
-	 /D _DEBUG /D WIN32 /Fo"$(INTDIR)/" /FD
+	 /D WIN32 /Fo"$(INTDIR)/" /FD
 
 LD_LIBS = kernel32.lib advapi32.lib ws2_32.lib wsock32.lib \
 	  ole32.lib shell32.lib rpcrt4.lib