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-rw-r--r--src/casefiddle.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/casefiddle.c b/src/casefiddle.c
index 9545cf697a8..815f684e26a 100644
--- a/src/casefiddle.c
+++ b/src/casefiddle.c
@@ -243,7 +243,8 @@ casify_region (enum case_action flag, Lisp_Object b, Lisp_Object e)
&& (!inword || flag != CASE_CAPITALIZE_UP))
c = UPCASE1 (c);
if ((int) flag >= (int) CASE_CAPITALIZE)
- inword = ((SYNTAX (c) == Sword) && (inword || !SYNTAX_PREFIX (c)));
+ inword = ((SYNTAX (c) == Sword)
+ && (inword || !syntax_prefix_flag_p (c)));
if (c != c2)
{
last = start;