diff --git a/src/ca65/scanner.c b/src/ca65/scanner.c
index f80fe2bca..361a817c1 100644
--- a/src/ca65/scanner.c
+++ b/src/ca65/scanner.c
@@ -824,7 +824,7 @@ static void ReadStringConst (int StringTerm)
                             break;
                         }
                     }
-                    /* otherwise, fall through */
+                    /* FALLTHROUGH */
                 default:
                     Error ("Unsupported escape sequence in string constant");
                     break;