diff --git a/win/Makerules b/win/Makerules
index 8aa258a6..26960571 100755
--- a/win/Makerules
+++ b/win/Makerules
@@ -26,8 +26,8 @@ ifeq ($(NASM),)
 NASM = nasm
 endif
 
-CFLAGS = -W3 -wd4996 -Iwin -I.
-CDEFINES = -DWIN32 -D_CRT_SECURE_NO_DEPRECATE
+CFLAGS = -W3 -wd4996 -Iwin -I. -DBMP_SUPPORTED -DGIF_SUPPORTED \
+	-DPPM_SUPPORTED -DTARGA_SUPPORTED
 ifeq ($(WIN64), yes)
 NAFLAGS = -fwin64 -DWIN64 -DMSVC -D__x86_64__ -Iwin/
 else