diff --git a/src/backend/optimizer/util/restrictinfo.c b/src/backend/optimizer/util/restrictinfo.c
index ef8df3d098..1c356e0809 100644
--- a/src/backend/optimizer/util/restrictinfo.c
+++ b/src/backend/optimizer/util/restrictinfo.c
@@ -378,15 +378,12 @@ commute_restrictinfo(RestrictInfo *rinfo, Oid comm_op)
 /*
  * restriction_is_or_clause
  *
- * Returns t iff the restrictinfo node contains an 'or' clause.
+ * Returns true iff the restrictinfo node contains an 'or' clause.
  */
-bool
+inline bool
 restriction_is_or_clause(RestrictInfo *restrictinfo)
 {
-	if (restrictinfo->orclause != NULL)
-		return true;
-	else
-		return false;
+	return (restrictinfo->orclause != NULL);
 }
 
 /*
@@ -395,7 +392,7 @@ restriction_is_or_clause(RestrictInfo *restrictinfo)
  * Returns true if it's okay to evaluate this clause "early", that is before
  * other restriction clauses attached to the specified relation.
  */
-bool
+inline bool
 restriction_is_securely_promotable(RestrictInfo *restrictinfo,
 								   RelOptInfo *rel)
 {
@@ -403,11 +400,8 @@ restriction_is_securely_promotable(RestrictInfo *restrictinfo,
 	 * It's okay if there are no baserestrictinfo clauses for the rel that
 	 * would need to go before this one, *or* if this one is leakproof.
 	 */
-	if (restrictinfo->security_level <= rel->baserestrict_min_security ||
-		restrictinfo->leakproof)
-		return true;
-	else
-		return false;
+	return (restrictinfo->security_level <= rel->baserestrict_min_security ||
+		restrictinfo->leakproof);
 }
 
 /*