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-rw-r--r--src/editfns.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/editfns.c b/src/editfns.c
index bc6553a7d2c..87e743afc31 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -3138,7 +3138,7 @@ styled_format (ptrdiff_t nargs, Lisp_Object *args, bool message)
char *format_start = SSDATA (args[0]);
bool multibyte_format = STRING_MULTIBYTE (args[0]);
ptrdiff_t formatlen = SBYTES (args[0]);
- bool fmt_props = string_intervals (args[0]);
+ bool fmt_props = !!string_intervals (args[0]);
/* Upper bound on number of format specs. Each uses at least 2 chars. */
ptrdiff_t nspec_bound = SCHARS (args[0]) >> 1;