diff --git a/src/include/utils/timestamp.h b/src/include/utils/timestamp.h
index 128cb034ed..14c8f6c91b 100644
--- a/src/include/utils/timestamp.h
+++ b/src/include/utils/timestamp.h
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.54 2005/08/12 18:23:56 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.55 2005/10/07 20:13:16 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -164,7 +164,7 @@ typedef int32 fsec_t;
 typedef double fsec_t;
 
 #define TIME_PREC_INV 1000000.0
-#define JROUND(j) (rint(((double) (j))*TIME_PREC_INV)/TIME_PREC_INV)
+#define JROUND(j) (rint(((double) (j)) * TIME_PREC_INV) / TIME_PREC_INV)
 #endif
 
 #define TIMESTAMP_MASK(b) (1 << (b))