diff --git a/src/polygon.c b/src/polygon.c
index dbc875a..1464577 100644
--- a/src/polygon.c
+++ b/src/polygon.c
@@ -918,6 +918,14 @@ spherepoly_rad(PG_FUNCTION_ARGS)
 
 	np = ArrayGetNItems(ARR_NDIM(float_vector), ARR_DIMS(float_vector));
 
+	if (ARR_HASNULL(float_vector))
+	{
+		elog(	 ERROR,
+			 "spherepoly_rad: invalid array has null values"
+			);
+		PG_RETURN_NULL();
+	}
+
 	if (np < 6 || np % 2 != 0)
 	{
 		elog(	 ERROR,
@@ -960,6 +968,14 @@ spherepoly_deg(PG_FUNCTION_ARGS)
 
 	np = ArrayGetNItems(ARR_NDIM(float_vector), ARR_DIMS(float_vector));
 
+	if (ARR_HASNULL(float_vector))
+	{
+		elog(	 ERROR,
+			 "spherepoly_deg: invalid array has null values"
+			);
+		PG_RETURN_NULL();
+	}
+
 	if (np < 6 || np % 2 != 0)
 	{
 		elog(	 ERROR,