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-rw-r--r--generic/tclDate.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/generic/tclDate.c b/generic/tclDate.c
index c9c1c3e..7688f2c 100644
--- a/generic/tclDate.c
+++ b/generic/tclDate.c
@@ -185,9 +185,9 @@ typedef struct DateInfo {
#define TM_YEAR_BASE 1900
-#define HOUR(x) ((int) (60 * x))
+#define HOUR(x) ((int) (60 * (x)))
#define SECSPERDAY (24L * 60L * 60L)
-#define IsLeapYear(x) ((x % 4 == 0) && (x % 100 != 0 || x % 400 == 0))
+#define IsLeapYear(x) (((x) % 4 == 0) && ((x) % 100 != 0 || (x) % 400 == 0))
/*
* An entry in the lexical lookup table.