1 files changed, 1 insertions, 1 deletions

diff --git a/src/casefiddle.c b/src/casefiddle.c
index 67862365a30..8b92d39cbb3 100644
--- a/src/casefiddle.c
+++ b/src/casefiddle.c
@@ -227,7 +227,7 @@ casify_region (flag, b, e)
       if (c != c2)
         changed = 1;
       if ((int) flag >= (int) CASE_CAPITALIZE)
-        inword = SYNTAX (c) == Sword;
+        inword = SYNTAX (c) == Sword && (inword || !SYNTAX_PREFIX (c));
     }
   if (i < end_byte)
     {