diff --git a/win/Makefile b/win/Makefile
index ebcc43df..76dcf80f 100755
--- a/win/Makefile
+++ b/win/Makefile
@@ -174,7 +174,10 @@ wrjpgcom.exe: wrjpgcom.obj jpeg.lib
 turbojpeg-static.lib: turbojpegl.obj $(LOBJS)
 	$(AR) -out:$@ $^
 
-turbojpeg.dll turbojpeg.lib: turbojpegl.obj $(LOBJS)
+turbojpeg-dll.obj: turbojpegl.c
+	$(CC) $(CFLAGS) -DDLLDEFINE -c $< -Fo$@
+
+turbojpeg.dll turbojpeg.lib: turbojpeg-dll.obj $(LOBJS)
 	$(LINK) $(LDFLAGS) -dll -out:turbojpeg.dll -implib:turbojpeg.lib $^
 
 
diff --git a/win/Makerules b/win/Makerules
index f4e18cdf..f122593b 100755
--- a/win/Makerules
+++ b/win/Makerules
@@ -9,7 +9,7 @@ ifeq ($(NASM),)
 NASM = nasm
 endif
 
-CFLAGS = -W3 -wd4996 -Iwin -I. -DDLLDEFINE
+CFLAGS = -W3 -wd4996 -Iwin -I.
 CDEFINES = -DWIN32 -D_CRT_SECURE_NO_DEPRECATE
 NAFLAGS = -fwin32 -DWIN32 -Iwin/
 ifeq ($(DEBUG), yes)