diff --git a/contrib/ltree/ltree_op.c b/contrib/ltree/ltree_op.c
index 778dbf1e98..da1db5fcd2 100644
--- a/contrib/ltree/ltree_op.c
+++ b/contrib/ltree/ltree_op.c
@@ -91,42 +91,42 @@ Datum
 ltree_lt(PG_FUNCTION_ARGS)
 {
 	RUNCMP;
-	PG_RETURN_BOOL((res < 0) ? true : false);
+	PG_RETURN_BOOL(res < 0);
 }
 
 Datum
 ltree_le(PG_FUNCTION_ARGS)
 {
 	RUNCMP;
-	PG_RETURN_BOOL((res <= 0) ? true : false);
+	PG_RETURN_BOOL(res <= 0);
 }
 
 Datum
 ltree_eq(PG_FUNCTION_ARGS)
 {
 	RUNCMP;
-	PG_RETURN_BOOL((res == 0) ? true : false);
+	PG_RETURN_BOOL(res == 0);
 }
 
 Datum
 ltree_ge(PG_FUNCTION_ARGS)
 {
 	RUNCMP;
-	PG_RETURN_BOOL((res >= 0) ? true : false);
+	PG_RETURN_BOOL(res >= 0);
 }
 
 Datum
 ltree_gt(PG_FUNCTION_ARGS)
 {
 	RUNCMP;
-	PG_RETURN_BOOL((res > 0) ? true : false);
+	PG_RETURN_BOOL(res > 0);
 }
 
 Datum
 ltree_ne(PG_FUNCTION_ARGS)
 {
 	RUNCMP;
-	PG_RETURN_BOOL((res != 0) ? true : false);
+	PG_RETURN_BOOL(res != 0);
 }
 
 Datum
diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index abf08b7a2f..e6aa52bb4b 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -184,7 +184,7 @@
  */
 #define atoui(x)  ((unsigned int) strtoul((x), NULL, 10))
 
-#define strtobool(x)  ((*(x) == 't') ? true : false)
+#define strtobool(x)  ((*(x) == 't'))
 
 #define nullable_string(token,length)  \
 	((length) == 0 ? NULL : debackslash(token, length))
diff --git a/src/backend/tsearch/ts_utils.c b/src/backend/tsearch/ts_utils.c
index ed16a2e25a..9539cf1326 100644
--- a/src/backend/tsearch/ts_utils.c
+++ b/src/backend/tsearch/ts_utils.c
@@ -142,5 +142,5 @@ searchstoplist(StopList *s, char *key)
 {
 	return (s->stop && s->len > 0 &&
 			bsearch(&key, s->stop, s->len,
-					sizeof(char *), pg_qsort_strcmp)) ? true : false;
+					sizeof(char *), pg_qsort_strcmp));
 }
diff --git a/src/backend/tsearch/wparser_def.c b/src/backend/tsearch/wparser_def.c
index 559dff6355..537c701cc7 100644
--- a/src/backend/tsearch/wparser_def.c
+++ b/src/backend/tsearch/wparser_def.c
@@ -1856,7 +1856,7 @@ TParserGet(TParser *prs)
 		}
 	}
 
-	return (item && (item->flags & A_BINGO)) ? true : false;
+	return (item && (item->flags & A_BINGO));
 }
 
 Datum