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-rw-r--r--include/asterisk/strings.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asterisk/strings.h b/include/asterisk/strings.h
index 2c49cc054..226c7bb67 100644
--- a/include/asterisk/strings.h
+++ b/include/asterisk/strings.h
@@ -218,7 +218,7 @@ int ast_build_string(char **buffer, size_t *space, const char *fmt, ...) __attri
\param fmt printf-style format string
\param ap varargs list of arguments for format
*/
-int ast_build_string_va(char **buffer, size_t *space, const char *fmt, va_list ap);
+int ast_build_string_va(char **buffer, size_t *space, const char *fmt, va_list ap) __attribute__((format (printf, 3, 0)));
/*!
* \brief Make sure something is true.