diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index 65d2b875f0..713a87df3c 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.212 2010/05/09 02:15:59 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.213 2010/08/02 01:24:53 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -3098,7 +3098,7 @@ DecodeInterval(char **field, int *ftype, int nf, int range,
 						break;
 
 					case RESERV:
-						tmask = (DTK_DATE_M || DTK_TIME_M);
+						tmask = (DTK_DATE_M | DTK_TIME_M);
 						*dtype = val;
 						break;
 
diff --git a/src/interfaces/ecpg/pgtypeslib/interval.c b/src/interfaces/ecpg/pgtypeslib/interval.c
index b9894d7ffc..47fb936a18 100644
--- a/src/interfaces/ecpg/pgtypeslib/interval.c
+++ b/src/interfaces/ecpg/pgtypeslib/interval.c
@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/src/interfaces/ecpg/pgtypeslib/interval.c,v 1.42 2009/09/03 09:59:20 meskes Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/pgtypeslib/interval.c,v 1.43 2010/08/02 01:24:54 tgl Exp $ */
 
 #include "postgres_fe.h"
 #include <time.h>
@@ -606,7 +606,7 @@ DecodeInterval(char **field, int *ftype, int nf,		/* int range, */
 						break;
 
 					case RESERV:
-						tmask = (DTK_DATE_M || DTK_TIME_M);
+						tmask = (DTK_DATE_M | DTK_TIME_M);
 						*dtype = val;
 						break;