diff --git a/coders/bmp.c b/coders/bmp.c
index 13a4c2e..a172411 100644
--- a/coders/bmp.c
+++ b/coders/bmp.c
@@ -71,7 +71,7 @@
 #define BI_JPEG  4
 #undef BI_PNG
 #define BI_PNG  5
-#if !defined(__WINDOWS__) || defined(__MINGW32__)
+#if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__)
 #define BI_RGB  0
 #define BI_RLE8  1
 #define BI_RLE4  2