diff --git a/src/util/virjson.c b/src/util/virjson.c
index 3ffa19f7db..9f2e1cfce2 100644
--- a/src/util/virjson.c
+++ b/src/util/virjson.c
@@ -797,7 +797,7 @@ virJSONValueIsArray(virJSONValuePtr array)
 
 
 int
-virJSONValueArraySize(virJSONValuePtr array)
+virJSONValueArraySize(const virJSONValue *array)
 {
     if (array->type != VIR_JSON_TYPE_ARRAY)
         return -1;
diff --git a/src/util/virjson.h b/src/util/virjson.h
index 1996a91104..c0aefba1d5 100644
--- a/src/util/virjson.h
+++ b/src/util/virjson.h
@@ -105,7 +105,7 @@ int virJSONValueObjectHasKey(virJSONValuePtr object, const char *key);
 virJSONValuePtr virJSONValueObjectGet(virJSONValuePtr object, const char *key);
 
 bool virJSONValueIsArray(virJSONValuePtr array);
-int virJSONValueArraySize(virJSONValuePtr object);
+int virJSONValueArraySize(const virJSONValue *array);
 virJSONValuePtr virJSONValueArrayGet(virJSONValuePtr object, unsigned int element);
 virJSONValuePtr virJSONValueArraySteal(virJSONValuePtr object, unsigned int element);