diff --git a/src/video/vid_ati_mach64.c b/src/video/vid_ati_mach64.c
index 9499f4ecc..2df7782ff 100644
--- a/src/video/vid_ati_mach64.c
+++ b/src/video/vid_ati_mach64.c
@@ -4595,7 +4595,7 @@ mach64gx_init(const device_t *info)
 {
     mach64_t *mach64 = mach64_common_init(info);
 
-    if (info->flags & DEVICE_ISA)
+    if (info->flags & DEVICE_ISA16)
         video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_mach64_isa);
     else if (info->flags & DEVICE_PCI)
         video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_mach64_pci);
@@ -4617,7 +4617,7 @@ mach64gx_init(const device_t *info)
         mach64->config_stat0 |= 6; /*VLB, 256Kx16 DRAM*/
         ati_eeprom_load(&mach64->eeprom, "mach64_vlb.nvr", 1);
         rom_init(&mach64->bios_rom, BIOS_VLB_ROM_PATH, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
-    } else if (info->flags & DEVICE_ISA) {
+    } else if (info->flags & DEVICE_ISA16) {
         mach64->config_stat0 |= 0; /*ISA 16-bit, 256k16 DRAM*/
         ati_eeprom_load(&mach64->eeprom, "mach64.nvr", 1);
         rom_init(&mach64->bios_rom, BIOS_ISA_ROM_PATH, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
diff --git a/src/video/vid_cl54xx.c b/src/video/vid_cl54xx.c
index 73be7cd76..21d9b21d8 100644
--- a/src/video/vid_cl54xx.c
+++ b/src/video/vid_cl54xx.c
@@ -4382,7 +4382,7 @@ gd54xx_init(const device_t *info)
         rom_init_interleaved(&gd54xx->bios_rom, BIOS_GD5428_BOCA_ISA_PATH_1, BIOS_GD5428_BOCA_ISA_PATH_2, 0xc0000,
                              0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
 
-    if (info->flags & DEVICE_ISA)
+    if ((info->flags & DEVICE_ISA) || (info->flags & DEVICE_ISA16))
         video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_gd54xx_isa);
     else if (info->flags & DEVICE_PCI)
         video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_gd54xx_pci);
diff --git a/src/video/vid_ht216.c b/src/video/vid_ht216.c
index 57b0f303c..b650cb53b 100644
--- a/src/video/vid_ht216.c
+++ b/src/video/vid_ht216.c
@@ -1604,7 +1604,7 @@ ht216_init(const device_t *info, uint32_t mem_size, int has_rom)
     mem_mapping_disable(&ht216->linear_mapping);
 
     ht216->id     = info->local;
-    ht216->isabus = (info->flags & DEVICE_ISA);
+    ht216->isabus = (info->flags & DEVICE_ISA) || (info->flags & DEVICE_ISA16);
     ht216->mca    = (info->flags & DEVICE_MCA);
 
     io_sethandler(0x03c0, 0x0020, ht216_in, NULL, NULL, ht216_out, NULL, NULL, ht216);