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-rw-r--r--src/libmp/port/dat.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libmp/port/dat.h b/src/libmp/port/dat.h
index 7c834ac8..50fbf671 100644
--- a/src/libmp/port/dat.h
+++ b/src/libmp/port/dat.h
@@ -1,4 +1,4 @@
-#define mpdighi (mpdigit)(1<<(Dbits-1))
+#define mpdighi (mpdigit)((ulong)1<<(Dbits-1))
#define DIGITS(x) ((Dbits - 1 + (x))/Dbits)
// for converting between int's and mpint's