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-rw-r--r--ngxtop/config_parser.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/ngxtop/config_parser.py b/ngxtop/config_parser.py
index f6999cf..430ac23 100644
--- a/ngxtop/config_parser.py
+++ b/ngxtop/config_parser.py
@@ -12,7 +12,7 @@ from .utils import choose_one, error_exit
REGEX_SPECIAL_CHARS = r'([\.\*\+\?\|\(\)\{\}\[\]])'
-REGEX_LOG_FORMAT_VARIABLE = r'\$([a-z0-9\_]+)'
+REGEX_LOG_FORMAT_VARIABLE = r'\$([a-zA-Z0-9\_]+)'
LOG_FORMAT_COMBINED = '$remote_addr - $remote_user [$time_local] ' \
'"$request" $status $body_bytes_sent ' \
'"$http_referer" "$http_user_agent"'