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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 0e2f69ba8..2ca75a69c 100644
--- a/include/asterisk/strings.h
+++ b/include/asterisk/strings.h
@@ -688,7 +688,7 @@ void ast_str_trim_blanks(struct ast_str *buf),
if (!buf) {
return;
}
- while (buf->__AST_STR_USED && buf->__AST_STR_STR[buf->__AST_STR_USED - 1] < 33) {
+ while (buf->__AST_STR_USED && ((unsigned char) buf->__AST_STR_STR[buf->__AST_STR_USED - 1]) < 33) {
buf->__AST_STR_STR[--(buf->__AST_STR_USED)] = '\0';
}
}