diff --git a/src/backend/utils/adt/geo_ops.c b/src/backend/utils/adt/geo_ops.c
index 535301a218..f1b632ef3c 100644
--- a/src/backend/utils/adt/geo_ops.c
+++ b/src/backend/utils/adt/geo_ops.c
@@ -4710,7 +4710,7 @@ circle_same(PG_FUNCTION_ARGS)
 	CIRCLE	   *circle1 = PG_GETARG_CIRCLE_P(0);
 	CIRCLE	   *circle2 = PG_GETARG_CIRCLE_P(1);
 
-	PG_RETURN_BOOL(((isnan(circle1->radius) && isnan(circle1->radius)) ||
+	PG_RETURN_BOOL(((isnan(circle1->radius) && isnan(circle2->radius)) ||
 					FPeq(circle1->radius, circle2->radius)) &&
 				   point_eq_point(&circle1->center, &circle2->center));
 }
diff --git a/src/test/regress/expected/geometry.out b/src/test/regress/expected/geometry.out
index 3b364d1e3b..b50103b216 100644
--- a/src/test/regress/expected/geometry.out
+++ b/src/test/regress/expected/geometry.out
@@ -4380,9 +4380,8 @@ SELECT c1.f1, c2.f1 FROM CIRCLE_TBL c1, CIRCLE_TBL c2 WHERE c1.f1 ~= c2.f1;
  <(100,200),10> | <(100,200),10>
  <(100,1),115>  | <(100,1),115>
  <(3,5),0>      | <(3,5),0>
- <(3,5),NaN>    | <(3,5),0>
  <(3,5),NaN>    | <(3,5),NaN>
-(9 rows)
+(8 rows)
 
 -- Overlap with circle
 SELECT c1.f1, c2.f1 FROM CIRCLE_TBL c1, CIRCLE_TBL c2 WHERE c1.f1 && c2.f1;