diff --git a/source/blender/makesrna/intern/rna_access.c b/source/blender/makesrna/intern/rna_access.c
index b0ed7e29c6a..07d873e225a 100644
--- a/source/blender/makesrna/intern/rna_access.c
+++ b/source/blender/makesrna/intern/rna_access.c
@@ -2035,7 +2035,7 @@ void RNA_property_int_get_array(PointerRNA *ptr, PropertyRNA *prop, int *values)
 	BLI_assert(RNA_property_array_check(prop) != false);
 
 	if ((idprop = rna_idproperty_check(&prop, ptr))) {
-		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop));
+		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop) || (prop->flag & PROP_IDPROPERTY));
 		if (prop->arraydimension == 0)
 			values[0] = RNA_property_int_get(ptr, prop);
 		else
@@ -2124,7 +2124,7 @@ void RNA_property_int_set_array(PointerRNA *ptr, PropertyRNA *prop, const int *v
 	BLI_assert(RNA_property_array_check(prop) != false);
 
 	if ((idprop = rna_idproperty_check(&prop, ptr))) {
-		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop));
+		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop) || (prop->flag & PROP_IDPROPERTY));
 		if (prop->arraydimension == 0)
 			IDP_Int(idprop) = values[0];
 		else
@@ -2297,7 +2297,7 @@ void RNA_property_float_get_array(PointerRNA *ptr, PropertyRNA *prop, float *val
 	BLI_assert(RNA_property_array_check(prop) != false);
 
 	if ((idprop = rna_idproperty_check(&prop, ptr))) {
-		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop));
+		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop) || (prop->flag & PROP_IDPROPERTY));
 		if (prop->arraydimension == 0)
 			values[0] = RNA_property_float_get(ptr, prop);
 		else if (idprop->subtype == IDP_FLOAT) {
@@ -2392,7 +2392,7 @@ void RNA_property_float_set_array(PointerRNA *ptr, PropertyRNA *prop, const floa
 	BLI_assert(RNA_property_array_check(prop) != false);
 
 	if ((idprop = rna_idproperty_check(&prop, ptr))) {
-		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop));
+		BLI_assert(idprop->len == RNA_property_array_length(ptr, prop) || (prop->flag & PROP_IDPROPERTY));
 		if (prop->arraydimension == 0) {
 			if (idprop->type == IDP_FLOAT)
 				IDP_Float(idprop) = values[0];