diff --git a/d868uv.c b/d868uv.c
index 47ebdbe..8156996 100644
--- a/d868uv.c
+++ b/d868uv.c
@@ -595,7 +595,7 @@ static void d868uv_upload(radio_device_t *radio, int cont_flag)
 //
 static int d868uv_is_compatible(radio_device_t *radio)
 {
-    return 1;
+    return strncmp("D868UVE", (char*)&radio_mem[0], 7) == 0;
 }
 
 static void print_id(FILE *out, int verbose)
diff --git a/md380.c b/md380.c
index c961d4d..c90a2c3 100644
--- a/md380.c
+++ b/md380.c
@@ -402,7 +402,8 @@ static void md380_upload(radio_device_t *radio, int cont_flag)
 //
 static int md380_is_compatible(radio_device_t *radio)
 {
-    return strncmp("D868UVE", (char*)&radio_mem[0], 7) == 0;
+    return strncmp("DfuSe", (char*)&radio_mem[0], 5) == 0 &&
+           strncmp("DR780", (char*)&radio_mem[0x125], 5) == 0;
 }
 
 //