diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index 156b1c7b..e7b684d7 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -4665,7 +4665,7 @@ __PACKAGE__->register_method({
 		    type => 'string',
 		    description => "A local resource",
 		},
-		description => "List local resources e.g. pci, usb"
+		description => "List local resources (e.g. pci, usb) that block migration."
 	    },
 	    'mapped-resources' => {
 		type => 'array',
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index ffd5d56b..155432d3 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2517,6 +2517,10 @@ sub check_local_resources {
 	    if ($entry->{mapping}) {
 		$add_missing_mapping->('pci', $k, $entry->{mapping});
 		push @$mapped_res, $k;
+
+		# don't add mapped devices as blocker for offline migration but still iterate over
+		# all mappings above to collect on which nodes they are available.
+		next if !$state;
 	    }
 	}
 	# sockets are safe: they will recreated be on the target side post-migrate