-#define PT *PT_TO_PT *PT_TO_MM
-#define MM *MM_TO_PT *PT_TO_MM
-#define CM *CM_TO_PT *PT_TO_MM
-#define INCH *INCH_TO_PT *PT_TO_MM
-#define BIGPOINT *BIGPOINT_TO_POINT *PT_TO_MM
-#define CHAR *CHAR_TO_PT *PT_TO_MM
+#define PT *(PT_TO_PT *PT_TO_MM)
+#define MM *(MM_TO_PT *PT_TO_MM)
+#define CM *(CM_TO_PT *PT_TO_MM)
+#define INCH *(INCH_TO_PT *PT_TO_MM)
+#define BIGPOINT *(BIGPOINT_TO_POINT *PT_TO_MM)
+#define CHAR *(CHAR_TO_PT *PT_TO_MM)