diff --git a/src/backend/utils/adt/tsgistidx.c b/src/backend/utils/adt/tsgistidx.c
index b8fd96dd7b..2c5617a47a 100644
--- a/src/backend/utils/adt/tsgistidx.c
+++ b/src/backend/utils/adt/tsgistidx.c
@@ -728,7 +728,7 @@ gtsvector_picksplit(PG_FUNCTION_ARGS)
 				size_alpha = SIGLENBIT(siglen) -
 					sizebitvec((cache[j].allistrue) ?
 							   GETSIGN(datum_l) :
-							   GETSIGN(cache[j].sign),
+							   cache[j].sign,
 							   siglen);
 		}
 		else
@@ -742,7 +742,7 @@ gtsvector_picksplit(PG_FUNCTION_ARGS)
 				size_beta = SIGLENBIT(siglen) -
 					sizebitvec((cache[j].allistrue) ?
 							   GETSIGN(datum_r) :
-							   GETSIGN(cache[j].sign),
+							   cache[j].sign,
 							   siglen);
 		}
 		else