diff --git a/radio/src/pulses/pulses.h b/radio/src/pulses/pulses.h
index 61b886f22..7d859c075 100644
--- a/radio/src/pulses/pulses.h
+++ b/radio/src/pulses/pulses.h
@@ -142,7 +142,7 @@ class BindInformation {
 
 class OtaUpdateInformation: public BindInformation {
   public:
-    char filename[255+1];
+    char filename[_MAX_LFN + 1];
     uint32_t address;
 };