diff --git a/client/src/cmdhfmf.c b/client/src/cmdhfmf.c
index 57e764d6a..a5b2d6509 100644
--- a/client/src/cmdhfmf.c
+++ b/client/src/cmdhfmf.c
@@ -129,8 +129,8 @@ static int initSectorTable(sector_t **src, size_t items) {
     // } sector_t;
 
     // This allocates based on the size of a single item
-    _Static_assert(sizeof(sector_t) >= 18); // if packed, would be 18
-    _Static_assert(sizeof(sector_t) == 24); // not packed, so each entry must be 24 bytes
+    _Static_assert(sizeof(sector_t) >= 18, "Unexpectedly small sector_t"); // if packed, would be 18
+    _Static_assert(sizeof(sector_t) == 24, "Sector_t used to be padded to 24 bytes?"); // not packed, so each entry must be 24 bytes
 
     (*src) = calloc(items, sizeof(sector_t));
     if (*src == NULL) {