diff --git a/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp b/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp
index 790028e05b..e36070d6f8 100644
--- a/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp
+++ b/src/system/kernel/disk_device_manager/KPartitioningSystem.cpp
@@ -69,6 +69,11 @@ KPartitioningSystem::Identify(KPartition *partition, void **cookie)
 	int fd = -1;
 	if (partition->Open(O_RDONLY, &fd) != B_OK)
 		return -1;
+
+	// if BlockSize is 0, identify_partition will cause a KDL
+	if (partition->BlockSize() == 0)
+		return -1;
+
 	float result = fModule->identify_partition(fd, partition->PartitionData(),
 		cookie);
 	close(fd);