diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index fe060cc1..e32620be 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1443,6 +1443,7 @@ sub print_drive_commandline_full {
 
     my ($storeid) = PVE::Storage::parse_volume_id($drive->{file}, 1);
     my $scfg = $storeid ? PVE::Storage::storage_config($storecfg, $storeid) : undef;
+    my $vtype = $storeid ? (PVE::Storage::parse_volname($storecfg, $drive->{file}))[0] : undef;
 
     my ($path, $format) = PVE::QemuServer::Drive::get_path_and_format(
 	$storecfg, $vmid, $drive, $live_restore_name);
@@ -1514,6 +1515,9 @@ sub print_drive_commandline_full {
 	}
     }
 
+    die "$drive_id: explicit media parameter is required for iso images\n"
+	if !defined($drive->{media}) && defined($vtype) && $vtype eq 'iso';
+
     if (!drive_is_cdrom($drive)) {
 	my $detectzeroes;
 	if (defined($drive->{detect_zeroes}) && !$drive->{detect_zeroes}) {
diff --git a/test/cfg2cmd/ide-no-media-error.conf b/test/cfg2cmd/ide-no-media-error.conf
new file mode 100644
index 00000000..48971463
--- /dev/null
+++ b/test/cfg2cmd/ide-no-media-error.conf
@@ -0,0 +1,15 @@
+# TEST: Config that doesn't specify an explicit `media` for an ISO drive
+# EXPECT_ERROR: ide3: explicit media parameter is required for iso images
+bootdisk: scsi0
+cores: 2
+ide0: cifs-store:iso/zero.iso,media=cdrom,size=112M
+ide1: cifs-store:iso/one.iso,media=cdrom,size=112M
+ide2: cifs-store:iso/two.iso,media=disk,size=112M
+ide3: cifs-store:iso/three.iso,size=112M
+memory: 512
+net0: virtio=2E:01:68:F9:9C:87,bridge=vmbr0
+ostype: l26
+scsi0: local:100/vm-100-disk-2.qcow2,size=10G
+scsihw: virtio-scsi-pci
+smbios1: uuid=3dd750ce-d910-44d0-9493-525c0be4e687
+vmgenid: 54d1c06c-8f5b-440f-b5b2-6eab1380e13d