diff --git a/src/device/isamem.c b/src/device/isamem.c
index 2b0b8f66b..278bc49a5 100644
--- a/src/device/isamem.c
+++ b/src/device/isamem.c
@@ -1176,7 +1176,7 @@ static const device_config_t ibmat_config[] = {
         .description = "Start Address",
         .type = CONFIG_SPINNER,
         .default_string = "",
-        .default_int = 512,
+        .default_int = 1024,
         .file_filter = "",
         .spinner = {
             .min = 0,
@@ -1224,7 +1224,7 @@ static const device_config_t genericat_config[] = {
         .description = "Start Address",
         .type = CONFIG_SPINNER,
         .default_string = "",
-        .default_int = 512,
+        .default_int = 1024,
         .file_filter = "",
         .spinner = {
             .min = 0,