Fix some typos.
diff --git a/include/ddraw.h b/include/ddraw.h
index 0f7a6c1..a5ca311 100644
--- a/include/ddraw.h
+++ b/include/ddraw.h
@@ -338,7 +338,7 @@
#define DDSCAPS2_RESERVED2 0x00000040
/* indicates surface will never be locked again */
#define DDSCAPS2_OPAQUE 0x00000080
-/* set at CreateSurface() time to indicate antialising will be used */
+/* set at CreateSurface() time to indicate antialiasing will be used */
#define DDSCAPS2_HINTANTIALIASING 0x00000100
/* set at CreateSurface() time to indicate cubic environment map */
#define DDSCAPS2_CUBEMAP 0x00000200