diff --git a/source/ubl-settings-video.h b/source/ubl-settings-video.h
index 45409f1..d4c8559 100644
--- a/source/ubl-settings-video.h
+++ b/source/ubl-settings-video.h
@@ -45,7 +45,7 @@
 
 #define get_resolutions_and_ports_command "xrandr | awk '\n\
 /^Screen / { next }\n\
-/^[A-Z]/ {\n\
+/^[a-zA-Z]/ {\n\
     if (port != \"\") {\n\
         print port \":\" (res ? res : \"\")\n\
     }\n\