diff --git a/mdb.c b/mdb.c
index 669aae0a..eff5dbe7 100644
--- a/mdb.c
+++ b/mdb.c
@@ -7032,7 +7032,8 @@ more:
 						offset *= 4; /* space for 4 more */
 						break;
 					}
-					/* FALLTHRU: Big enough MDB_DUPFIXED sub-page */
+					/* Big enough MDB_DUPFIXED sub-page */
+					/* fallthrough */
 				case MDB_CURRENT | MDB_NODUPDATA:
 				case MDB_CURRENT:
 					fp->mp_flags |= P_DIRTY;
diff --git a/mdb_dump.c b/mdb_dump.c
index 0b5db58e..485f8f4f 100644
--- a/mdb_dump.c
+++ b/mdb_dump.c
@@ -186,7 +186,7 @@ int main(int argc, char *argv[])
 			break;
 		case 'l':
 			list = 1;
-			/*FALLTHROUGH*/;
+			/* fallthrough */
 		case 'a':
 			if (subname)
 				usage(prog);