diff --git a/src/kits/storage/disk_device/Partition.cpp b/src/kits/storage/disk_device/Partition.cpp
index 5af7ca6a27..f086c91ec2 100644
--- a/src/kits/storage/disk_device/Partition.cpp
+++ b/src/kits/storage/disk_device/Partition.cpp
@@ -361,7 +361,7 @@ BPartition::GetPath(BPath* path) const
 status_t
 BPartition::GetVolume(BVolume* volume) const
 {
-	if (volume)
+	if (!volume)
 		return B_BAD_VALUE;
 
 	return volume->SetTo(_PartitionData()->volume);