1 files changed, 4 insertions, 0 deletions
diff --git a/dive.h b/dive.h
index 92d358d02..58b6611f8 100644
--- a/dive.h
+++ b/dive.h
@@ -187,6 +187,10 @@ struct dive {
  * the input and output may come in some random format. This
  * keeps track of those units.
  */
+/* turns out in Win32 PASCAL is defined as a calling convention */
+#ifdef WIN32
+#undef PASCAL
+#endif
 struct units {
 	enum { METERS, FEET } length;
 	enum { LITER, CUFT } volume;