diff --git a/src/table/settings.ini b/src/table/settings.ini
--- a/src/table/settings.ini
+++ b/src/table/settings.ini
@@ -2425,6 +2425,16 @@ def      = 25
 min      = 1
 max      = UINT8_MAX
 
+[SDTC_VAR]
+var      = gui.graph_line_thickness
+type     = SLE_UINT8
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = 3
+min      = 1
+max      = 5
+str      = STR_CONFIG_SETTING_GRAPH_LINE_THICKNESS
+proc     = RedrawScreen
+
 ; For the dedicated build we'll enable dates in logs by default.
 [SDTC_BOOL]
 ifdef    = DEDICATED