diff --git a/firmware/export/config-ondiofm.h b/firmware/export/config-ondiofm.h
index 53bb7f2bc4..c7bdf2ae88 100644
--- a/firmware/export/config-ondiofm.h
+++ b/firmware/export/config-ondiofm.h
@@ -76,4 +76,7 @@
 /* Define this if you have a software controlled poweroff */
 #define HAVE_SW_POWEROFF
 
+/* define this if more than one device/partition can be used */
+#define HAVE_MULTIVOLUME
+
 #endif /* SIMULATOR */
diff --git a/firmware/export/config-ondiosp.h b/firmware/export/config-ondiosp.h
index 9bf29f17a5..6b6251a627 100644
--- a/firmware/export/config-ondiosp.h
+++ b/firmware/export/config-ondiosp.h
@@ -67,4 +67,7 @@
 /* Define this if you have a software controlled poweroff */
 #define HAVE_SW_POWEROFF
 
+/* define this if more than one device/partition can be used */
+#define HAVE_MULTIVOLUME
+
 #endif /* SIMULATOR */